Book.ir is a Persian-language online book platform that helps readers discover books across a wide range of subjects and genres. Its catalog features Iranian and international novels, historical works, educational and academic titles, biographies, medicine, geography, psychology, philosophy, politics, poetry and literature, religion, business, music, art, sports, and lifestyle. The site also offers audiobooks and books in their original languages, alongside downloadable PDF titles.

Visitors can browse recent additions by category, explore selected recommendations, and find books through featured author pages. The catalog includes works by Iranian writers as well as internationally known authors such as Jules Verne, Leo Tolstoy, Charles Dickens, William Faulkner, and Heinrich Böll. Book listings identify titles and authors, with many presented as free downloads. A weekly featured selection provides further information about a chosen book, including its publisher, publication year, page count, and a synopsis. With its organized categories and browsing tools, Book.ir aims to make access to diverse reading material faster and simpler for Persian-speaking users.