The Book of haricanto is a book written by an ancient sorcerer from the Eastern Lands named Haricanto, and is found during the Ghosts Ahoy quest. It is one of three items that players must present to the Old Crone.
Players can find it on Dragontooth Island by starting one square west of the statue of Saradomin near the north-western peninsula and following the instructions on the treasure map. They must then dig with a spade to find the book.
The book is found in the middle of the south part of the island.
The book may be kept after the quest if a duplicate is made by using the drop trick. Previously players could not store it in the bookshelf, but due to a recent update it is possible to place it there but not to retrieve it.