Try To Remember
As a children's librarian a certain percentage of my time is dedicated towards helping people locate that book from their childhood they vaguely remember but can't quite recall the name of. The easiest of these was when this punk rock, heavily pierced, tattooed fellow came up to my children's desk and asked if I knew of a black and white picture book that could be read forwards and then upside down. Thank God he was from my generation. The guy was practically in tears when I was able to hand him the Ann Jonas book in question.
But sometimes (mostly, in fact) I don't know what that book was that you read as a kid. Fortunately, there are some solutions at hand. A librarian can always ask the Pubyac listserv and take the advice of librarians nationwide. Or you can go to a site like Stump the Bookseller which is published by Loganberry Books. Any and all other solutions are welcome.