Learning & thinking · a life skill
Deliberate Book Summaries
five rules for cutting a chapter down
A summary isn't a shorter copy. It's what's left after five decisions: what's only detail, what's said twice, which lists can be called by one name, which sentence already says the point, and where the point was never said at all. The first two are easy. The last one is where most summaries fall short.
- Moderate to start
- High impact
- Learn it in 2-4 weeks
- Five rules, one chapter a week
The second paragraph never says what it's about, so the summary has to. That written-in line is the rule people skip, and the one the summary leans on most.
Two to four weeks
Try it now.
One chapter a week. Work a paragraph or a section at a time, in this order, and write one line for each. Then write the chapter from those lines.
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Cross out the detail
Examples, asides and stories that only illustrate. Keep one example if the idea makes no sense without it.
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Cross out the repeats
Authors say the important thing two or three times on purpose. Keep the clearest version and drop the others.
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Swap each list for its name
"Texts, emails and quick questions" becomes "interruptions". The name has to cover every item, and nothing that isn't on the list.
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Find the topic sentence
Often first, sometimes last. When a paragraph has one, it's the author's own summary of it, so start your line there.
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Write the one that's missing
If no sentence says what the paragraph is for, write it yourself. It's the hardest of the five, and the one that makes the summary yours.
Stuck on a section? Ask what all its sentences have in common. The answer is usually the missing line.
By week four, write a chapter onto one index card from its lines, then the whole book onto one page from the chapter cards. Each step down uses the same five rules.
Your rule bench
Paste a passage and mark each sentence.
Copy in a few paragraphs from the book you're reading, with a blank line between paragraphs. Each sentence gets a row. Mark it as detail, a repeat, a list to name, or the topic sentence, and leave the rest as kept. Where a paragraph has no topic sentence, write one in. The page builds the lines and counts the words.
One line per paragraph
The lines above are the parts. This is the summary.
Nothing you type or paste is saved or sent anywhere. It's gone when you leave the page, so copy the summary into wherever you keep your notes.
Where the rules came from
Even fifth graders cut detail and repeats. Writing the topic sentence a paragraph didn't have was the rule that lagged, well into college.
Ann Brown and Jeanne Day set out to see how the rules of summarising develop. They took five rules from earlier work on how readers condense text (delete trivia, delete repeats, replace a list with its category, select the topic sentence, and invent one where there isn't one) and wrote passages that called for each of them.
Fifth, seventh and tenth graders and college students summarised them. Cutting trivia and repeats was near ceiling at every age, around ninety percent or better. College students named a list with its category about seventy percent of the time. Inventing a missing topic sentence was the hardest: rare in fifth and seventh grade, about a third of the time in tenth, and about half the time for college students.
Then they asked graduate students who had taught first-year college writing to do the same. They named every list and wrote the missing topic sentence far more often than the college students, .84 against .49. They also did something the younger writers rarely did: they combined paragraphs that shared a topic, and summarised across them.
The honest limits: this was a study of who uses the rules, comparing age groups and experience, not a test of whether teaching them improves summaries. The passages were short and written for the study. What it gives you is a map of which steps are easy and which one to practise.
The idea
Why it works.
The first two rules only throw things away, so anyone can do them without understanding much. The last three can't be done without understanding: you can't name a list until you see what its items share, and you can't write a missing topic sentence until you know what the paragraph is for.
That's why the order matters. Cutting first clears the page so the harder decisions are easier to see, and the paragraphs where you have to write the line yourself point straight at the parts of the chapter you'd only skimmed.
When it goes wrong
Habits that help.
- Pick a name that covers the list. "Interruptions" covers texts, emails and questions. "Phones" doesn't. A name that's too small quietly changes what the author said.
- Don't keep a sentence because you liked it. Copy it into a quotes list instead. The summary is for the argument, not the best lines.
- Combine paragraphs that share a topic. One line can cover three paragraphs if they make one point. The experienced writers in the study did it on their own.
- Watch your word count fall. If your lines run to more than a third of the original, you're still copying. Go back to the first two rules.
Practise this in HourLife.
In Media: Takeaways. Keep one queue of films, series, podcasts, albums, audiobooks, and books, track what you're partway through, and rate what you finish.
