tell-all book; exposé book; scandalous book
A book that reveals private or scandalous information, often about a person or organization. Can be used for kiss-and-tell memoirs, political exposés, or industry tell-alls.
That politician's tell-all book became a bestseller.
She wrote a kiss-and-tell book about her ex-boyfriend.
Compound of 暴露 (ばくろ, 'exposure, disclosure') and 本 (ほん, 'book'). The reading ぼん is a rendaku form of ほん.