
Book · Thrillers and mysteries
The Cliffs
by J. Courtney Sullivan
Page count, estimated reading time and reading quiz: everything to know before you start The Cliffs, and the Vread challenge to get to the end.
- Pages
- 320
- Reading time
- ≈ 5 h 50 min
- Checkpoints
- 14
- Genre
- Thriller
Free on iPhone and Android.
How long does it take to read The Cliffs?
At 320 pages, The Cliffs is a fairly long book. Expect about 5 hours 50 minutes of reading to finish it, based on 250 words per page and an average reading speed of 230 words per minute. A fast reader will go quicker; a careful read (or reading in a second language) will take longer.
At 30 minutes a day, that is about 12 days of reading. At the median pace of Vread readers, 72 pages per reading day, it takes 5 reading days. For a book of this length (250 to 399 pages), Vread readers who finish it take a median of 4.7 days between the first and the last checkpoint (Vread Reading Barometer 2026).
- 30 minutes a day12 days
- Vread median pace (72 pp./day)5 days
Estimates; see the method at the bottom of the page.
Prove you read it
The Vread challenge: 14 checkpoints
- Checkpoint 1, page 23
- Checkpoint 2, page 46
- Checkpoint 3, page 69
- Checkpoint 4, page 91
- Checkpoint 5, page 114
- Checkpoint 6, page 137
- Checkpoint 7, page 160
- Checkpoint 8, page 183
- Checkpoint 9, page 206
- Checkpoint 10, page 229
- Checkpoint 11, page 251
- Checkpoint 12, page 274
- Checkpoint 13, page 297
- Checkpoint 14, page 320
In Vread, The Cliffs is split into 14 checkpoints, one every 23 pages or so. At each checkpoint, a question covers the passage you have just read: a correct answer validates the step, and your progress moves forward like a training plan.
The challenge: validate all 14 checkpoints through to the last page. No giant quiz at the end, no summary to copy out: short questions along the way that prove the book was actually read. It also works as a reading quiz to check your understanding before a test.
Also available in French on Vread.
Illustrative example
What a checkpoint looks like
A short, precise question about the pages you have just read: a character, a place, a choice.
The answer is in the text: reply in the app.

This is not a question from The Cliffs: to avoid spoilers, the real questions stay in the app.
Answer in the app, one checkpoint at a time.
Summary, quiz, reviews: frequently asked questions
How many pages is The Cliffs?
How long does it take to read The Cliffs?
Is there a quiz on The Cliffs?
Where can I find a summary of The Cliffs?
Similar books: thrillers and mysteries
Read The Cliffs with Vread
Add the book to your library, read at your own pace in whatever format you use, and validate each checkpoint. Vread is free on iPhone and Android.
Take the challenge





