[SixOfSpades]

There are tons of books scattered all throughout the game. Most of these are history books, like "History of Dambrath," "History of the North," "History of Durpar and Var," etc, that do not contain any information about how to defeat enemies or solve quests, they merely provide background for greater game immersion. But many other books exist in the game too--they usually look different from the history books, and it is usually in your best interests to read them at least once. One book in particular is called "Elminster's Ecologies," and can be found in many Throne of Bhaal areas. I suggest you go find a copy.