Translation guide
In Japanese, the most common way to say 'electronic book' is 電子書籍 (denshi shoseki), which is the standard term for e-books. The loanword イーブック (ībukku) is also used, especially in commercial contexts. For specific devices, 電子ブック (denshi bukku) may appear, but it's less common.
The standard way to refer to an electronic book, as a digital publication.
The most common and formal term for 'electronic book' or 'e-book'. Used in official contexts, publishing, and everyday conversation.
Lately, I've been reading a lot of e-books.
Loanword from English 'e-book'. Commonly used in marketing, app names, and casual contexts. Less formal than 電子書籍.
I downloaded an e-book.
A less common hybrid term. Sometimes used for specific e-book devices or older technology, but generally 電子書籍 is preferred.
この小説は電子書籍でも購入できます。
This novel can also be purchased as an e-book.
I bought an e-book reader.