Baldur's Gate and Baldur's Gate: Enhanced Edition feature a series of tomes & manuals which allow the player to permanently increase a character's ability stats by one point. Each book is destroyed upon using it. Overall there exist eight different ones of this kind, one for each stat - with the exception of the Tome of Understanding - of which there exist three. All of them can be found throughout the main game's locations and can be used on any party member.
It is important to note that - except for the protagonist - the attribute raise does not carry over in-between games. For example, if the player were to use the Manual of Gainful Exercise to raise Viconia's strength from 10 to 11, she will still have her default 10 strength in Baldur's Gate II.
|Tome of Understanding||Wisdom||BOOK08|
|Tome of Leadership and Influence||Charisma||Gnoll Stronghold||BOOK07|
|Tome of Clear Thought||Intelligence||Ramazith's Tower||BOOK06|
|Manual of Quickness of Action||Dexterity||Thieves' Guild||BOOK05|
|Manual of Gainful Exercise||Strength||Candlekeep Catacombs||BOOK04|
|Manual of Bodily Health||Constitution||Pirate Cave||BOOK03|
The different books also exist in the game codes of the other games in the series, even though they do not show up in game. They can however be achieved through the console.