Book of Abraham
- "Despite my warning, I glance at the page. It is blank. Both pages are blank. Suddenly, symbols fill my mind!"
- ―Giovanni Borgia, upon looking at the Book.[src]
The Book was used in Bombastus' study to learn how to create gold from other elements. It was an unadorned tome that seemed to be made up of blank pages, but it filled people's minds with ideas when read.
Once, after having looked at the Book, Bombastus' apprentice Johan apparently went mad, once raving that "My mind is a small, small cup. Overfilled! Bursting! Cracked!" This suggests that madness can come from learning too much from the Book at once. To guard against this, Bombastus often read the Book with his hands at the sides of his eyes as blinders.
When Giovanni Borgia read the Book's pages, he was enlightened by knowledge of a certain formula, which he quickly wrote down. Upon following the instructions, he and Bombastus discovered it to be the method of crafting the Philosopher's Stone.
In 1527, Giovanni Borgia returned to Bombastus to ask some questions. However, Bombastus refused to answer. Giovanni demanded him to read the book for it holds the answers. Bombastus confessed the book is incomplete and he will need "the other half."