It was a page-turner.

Meaning

The book was so engaging that it was hard to stop reading.

Examples

• John: How was the book I lent you?
• Alice: Amazing! <b>It was a page-turner</b>. I finished it in two days!
• John: I figured you'd like it. The plot was quite compelling.
• Alice: Absolutely! The constant suspense kept me hooked. <b>It was a page-turner</b>.