Icha Icha

Icha Icha is a series of best-selling novels which were written by Jiraiya. Kakashi Hatake is a big fan of the series and is shown reading one of them most of the time. They are comedic (and likely adult) recounts of Jiraiya's experiences in love. They are meant for people of 18 and over. And it is shown that not only are the Icha Icha Books popular with Kakashi but also very popular with many other numerous characters throughout the series, (And Because of their romantic themes)they are slightly known to be enjoyed by women (which is probably another reason why Jiraiya created them because of his personality.

Known Books

 * : The first book to appear in the series. In Naruto the Movie: Ninja Clash in the Land of Snow, Yukie Fujikaze stars in a movie-adaptation of this book.
 * : The second book. It also became a movie, as seen in episode 101.
 * : The third book. Naruto Uzumaki gave this book to Kakashi when he returned to Konoha after a two and a half year absence. It was the newest instalment in several years. When Jiraiya sent the secret of Pain's identity to Konoha, he used the first word from various pages in the book to decode his message. The resulting message was: "The real one isn't among them." This is presumably the last volume as Jiraiya is now deceased.
 * Icha Icha Strap: A book only seen in the game Naruto: Ultimate Ninja 3 that can be given to Ebisu.
 * There is also an unofficial Icha Icha novel that was written by Naruto Uzumaki in episode 177. Naruto finished the manuscript for Jiraiya (so that Jiraiya would train him again) and accidentally sent it to the wrong place (the Land of Fangs). The book was mistaken for a peace treaty, and, since the daimyō enjoyed it, he afterwards ended the war with the Land of Claws.