noun
Refers to a digital book, often synonymous with 電子書籍 (denshi shoseki).
See also: 電子書籍
最近は電子ブックで小説を読む人が増えている。
Recently, more people are reading novels as e-books.
電子書籍 is a more formal and common term for e-books, while 電子ブック is a slightly more casual or marketing-oriented variant.
Compound of 電子 (denshi, 'electronic') and ブック (bukku, from English 'book').