Certain books will give a specific effect:

Weekly Photo Magazine: Skill+ (get a visual cue to indicate prime photo timing)
Sports: Item+ (hold onto sporting goods three times as long as usual)
Camera 1: PP+ (get a 25% boost to PP resulting from photos)
Hobby: Item+ (hold onto toys three times as long as usual)
Engineering: Item+ (hold onto tools and construction related items three times as long as usual)
Horror Novel 2: PP+ (get a 25% boost to PP resulting from defeating zombies)
Entertainment: Item+ (hold onto entertainment related goods three times as long as usual)
Interior Designing: Item+ (hold onto interior designing goods three times as long as usual)