The sorcerer who unlocks the secrets of this book will gain the ability to learn the location of people that they used to know.
If they study further, they will gain the ability to appear far younger than they really are.
If they study still further they will gain the ability to cloud the minds of others, so that they will accept the sorcerer as their friend.
The book, however, will charge a price. The more it is used, the less intelligent the sorcerer will become.