Tom Riddle's diary is a horcrux. if you haven't read past the second one then you'll learn about horcruxes in the sixth and seventh books. I dont want to spoil it any farther than that.
Diary
In the room where Hagrid is it's at the end of the level Tom Riddles Diary.
He found it in Moaning Myrtle's bathroom, after it had been thrown at her.
Tom Riddles Diary (Year 2 in the Chamber of Secrets)
I would say J.K Rowlings Pottermore. Or Tom Riddles (chamber of secrets) diary where you, yourself can talk to Tom. There are many sites for fanfictions, one of them is fanfiction.net (surprise;)
(Not in order) Harry Potter, Voldemort's pet snake,the ring, the locket, the goblet, tom riddles diary, the lost heirloom of Hufflepuff. There are actually 7 horcruxes!
Tom Marvolo Riddle
THIS IS A SPOLIER FOR HARRY POTTER 7 tom riddles diary tom's ring slytherin's locket hufflepuff's cup ravenclaw's diadem voldemort's snake harry's scar
Riddles originated from well they were made by "Rhind Mathematical Papyrus.
It is not safe at all. It turned out to be quite dangerous. Read the book for more details. Please note that this is all ficticious - such a diary doesn't exist in real life.
its mad of a big piece of parchment with a spell cast upon it like tom riddles diary where the ink goes threw it isnt the ink its the spell cast
Tom Thatcher has written: 'The Riddles of Jesus in John'
In Harry Potter and the Chamber of Secrets. Tom Riddle's diary.