Summary: A reading journal is a running record of your reaction to what you read, not a list of titles or a highlight reel. Google Trends data puts it as the sharpest 5-year riser among 30 journaling techniques we tracked (search interest up from roughly 10.7 to 69.6), and direct research on the practice is thin. What follows is the practice as people actually do it, honestly marked where the evidence runs out.
What it is
A reading journal is where you write down what you thought about a book, not just that you read it. An entry might be a single line ("finished, didn't buy the ending") or a page of argument with the author. What makes it a reading journal rather than a book log is the reaction: the log tracks titles, the journal tracks thinking.
That distinction matters because the three things people call "keeping track of my reading" are genuinely different practices. A book log is a list: title, date started, date finished, star rating. A reading journal is your reaction to the book: what struck you, what you disagreed with, what it reminded you of. Marginalia is notes written inside the book itself, useful in the moment but scattered across however many books you own, unsearchable as a body of thought. A reading journal is what you get when you move the marginalia out of the book and into one place.
Where it comes from
Recording your reaction to reading is not new. What's new is the name and the volume of people doing it publicly. The practice has real historical depth: Bhagat Singh filled a 404-page notebook in Lahore Central Jail between 1929 and 1931, awaiting trial and execution, copying passages from what he read alongside his own aphorisms and philosophical notes. Thomas Merton kept journals from before he entered the Abbey of Gethsemani until his death in 1968, later published in seven volumes, threading his reading through his monastic struggle and self-examination.
What's changed recently is not the practice but the demand for how-to guidance around it. Google Trends search interest in "reading journal" is the sharpest 5-year riser we found across 30 journaling techniques we tracked, moving from a baseline around 10.7 to 69.6. That rise tracks with BookTok and StoryGraph: platforms built around cataloguing and discussing reading at a scale that didn't exist ten years ago. This page isn't going to editorialize about that shift. It's real demand, and the field covering it well is still thin: mostly small niche sites, not an authoritative guide.
The commonplace-book overlap
A reading journal is easy to confuse with a commonplace book, an older and narrower practice: a lifelong notebook of quotes and passages worth keeping, with little or no commentary attached. Marcus Aurelius, John Locke, and Thomas Jefferson all kept versions of one. The commonplace book collects; the reading journal reacts.
In practice the line blurs. Most people who keep a reading journal end up collecting quotes inside it too, and most commonplace-book keepers add a line of their own reaction next to a passage that struck them. If you want the commonplace-book side of this in full, that overlaps more with idea logging than with reading response: see the idea log method.
Who uses it
Anchors with a documented, sourced practice are thinner here than for more established methods, but two hold up on primary sources:
- Bhagat Singh, Indian revolutionary. His 404-page jail notebook, kept while awaiting execution, mixes copied passages from his reading with his own philosophical notes and aphorisms. The notebook survives in full facsimile.
- Thomas Merton, Trappist monk and theologian. His journals, kept continuously from before he entered the monastery until his death, record his reading life alongside self-examination. Published in seven volumes.
If you're looking for a wider gallery of people who journal in some form, see famous journalers.
What the evidence actually says
There is no research on "reading journals" as a defined practice. Nobody has run a trial comparing people who write about their reading against people who don't. What exists are two adjacent, and genuinely different, bodies of evidence.
The closer one is about note-taking generally. Bohay and colleagues (2011) tested whether taking notes while reading a text, or watching a video lecture, improved comprehension, measured immediately and again a week later. Across two experiments, note-taking improved performance specifically at the "situation model" level, the deeper understanding of what a text means, not just what it literally said. That's real evidence that active engagement with what you read, in the form of writing something down, helps you understand and retain it better than passive reading. It is evidence about note-taking broadly, not about the specific practice of a running reaction journal, but it's the closest direct support this page can point to.
The other body of evidence, bibliotherapy, gets invoked around reading practices constantly and doesn't actually apply here. Gualano and colleagues (2017) reviewed 8 randomized trials (1,347 subjects) and found bibliotherapy, structured self-help reading used as a depression treatment, reduced symptoms long-term in most studies of adults. Cuijpers (1997) and Moldovan and colleagues (2013) back that up. But bibliotherapy studies what reading a prescribed self-help text does to you clinically. It says nothing about writing your reactions to whatever you're reading for its own sake. The two get conflated because they both involve books, but the mechanism under study is different: in bibliotherapy, the reading is the treatment; in a reading journal, the writing is the practice, and the book is just the prompt.
Put plainly: reading journals are supported by general note-taking research and nothing more specific. That's a real but modest basis, not proof the practice does anything beyond what any active engagement with a text does.
The protocol
- Finish a chapter, a sitting, or a book. Don't interrupt your reading to write. Capture the reaction at a natural stopping point, while it's fresh.
- Write or speak three things: what happened in what you read, what you thought about it, and one line you want to remember. Skip whichever doesn't apply.
- Name the book and date the entry. Title, author, date. Three seconds of overhead, and the only thing that keeps a running file searchable months later.
- Record disagreement as often as praise. A journal that only logs what you loved is a highlight reel. The interesting entries are usually the ones where you push back.
- Close it until next time. No pressure to log every book, or every chapter of one. Log the ones that moved you.
The voice adaptation
Writing a reading journal by hand or by keyboard means opening a notebook or a note-taking app, finding your place, and typing while the reaction is still live. That's friction, and friction is exactly what kills a habit like this after a week.
Speaking the entry removes most of that friction. You finish a chapter, put the book down, and talk for thirty seconds: what happened, what you thought, one line to remember. No app-switching, no typing while trying to hold a half-formed thought in your head.
What you lose with voice
- The physical act of copying out a quote by hand, which some readers find helps them remember it
- A single glance-able page of neat entries; spoken notes need transcription and light cleanup to read as smoothly as handwritten ones
- The built-in slowness of writing, which for some readers is part of what makes them stop and actually think before moving on
What you gain with voice
- Speed: a thirty-second spoken reaction beats finding a notebook and writing a paragraph, especially mid-book when you don't want to break your reading momentum
- Capture in the moment a thought is sharpest, rather than a diluted version reconstructed later
- A searchable transcript, so months later you can search "antifragile" or "unreliable narrator" and pull up every book where you wrote about that idea
Try it by voice: Brain Dump: finish a chapter, hit record, and speak your reaction before you pick the book back up; the entry is transcribed and filed under the book's title automatically.
If you want a system built specifically around capturing insights mid-read rather than after finishing, see voice book notes, which covers folder structure and a Siri shortcut for appending to the current chapter's notes.
Common mistakes
Treating it as a book log. Title, date, star rating is a list, not a journal. The value comes from writing what you thought, not that you finished it.
Only logging the books you loved. A journal that skips anything you found boring or wrong isn't a record of your thinking, it's a highlight reel. Write about the books that frustrated you too.
Trying to log every book. This is the fastest way to make the habit feel like homework. Log the ones with something to say about, skip the rest.
Copying without reacting. A page of quotes with no commentary is a commonplace book, not a reading journal. If nothing but the passage itself is worth keeping, that's fine, just be clear that's a different practice with a different goal.
When not to do this
If you read purely for entertainment and have no interest in tracking your reactions, a reading journal adds friction without a payoff you'll notice. A simple book log, or nothing at all, is a better fit. The practice earns its keep for readers who already find themselves wanting to argue with a book, or who lose track of good ideas a few weeks after finishing.
Related:
- the idea log method: the commonplace-book lineage this practice overlaps with
- voice book notes: capturing insights mid-chapter, not just after finishing
- famous journalers: a wider gallery of documented journaling practices
- start a reading journal today: the minimum viable first entry