Yes as skuld said too, having any book with magical abilities in your inventory you automatically get the bonuses/penalties from it. if the books has some spell effect charged on it you can use it to cast the spell the way you use all the magic items.
"When I am working on a problem I never think about beauty. I only think about how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." Buckminster Fuller