As we all know, Kagami loves to read her light novels. She's content to criticize Konata for skipping straight to the anime and never getting around to the original sources. Well, LightNovel.org has compiled a list of all the books that she reads throughout the series.
Some of the more interesting titles that Kagami has read throughout Lucky Star are The Girl Who Stopped Time, Mushi-Uta, and Rental Magica. Unfortunately, light novels aren't frequently brought over here to the U.S., and the fan translations of them are few and far between as well.
If you happen to know of anywhere where translations are available, let us know! I'd like to not have to wait 596757089 years for Seven Seas to translate all of Boogiepop.