can someone please explain to me how to tell what edition a book is. i have been collecting lgb for about 10 years (but not as a serious collector) i have about 250 books i would like to get rid of but dont know how to tell if the are worth anything or not. i read the home page but it didnt make much sense to me. again im not a serious collector. if someone could explain this in lamens terms i would sure appreciate it. thank you so much for your time.