* Harry Potter and the Half-Blood Prince: This book hints at Horcruxes with Dumbledore's research on the subject and his revelation that Voldemort had split his soul. However, the specific items are not identified.
* Harry Potter and the Deathly Hallows: This book is where the Horcruxes are explicitly unveiled.
* The Diary of Tom Riddle: Destroyed by Harry Potter in Chapter 12.
* Marvolo Gaunt's Ring: Destroyed by Dumbledore in Chapter 23.
* Salazar Slytherin's Locket: Found and destroyed by Ron, Harry, and Hermione in Chapter 24.
* Helga Hufflepuff's Cup: Found and destroyed by Hermione in Chapter 27.
* Ravenclaw's Diadem: Found and destroyed by Harry in Chapter 28.
* Nagini (Voldemort's snake): Destroyed by Neville Longbottom in Chapter 36.
* Harry Potter: It's revealed in Chapter 36 that Harry unknowingly became a Horcrux when Voldemort used the Killing Curse on his mother.
* Harry Potter and the Order of the Phoenix: This book provides some clues about Horcruxes, particularly through Dumbledore's conversations with Harry about Voldemort's past and his growing obsession with immortality.
It's important to note that the books provide clues and information throughout the series, but the full revelation of the Horcruxes and their destruction comes primarily in Harry Potter and the Deathly Hallows.