It's Monday, Picture Books Past. Old children's books may be personal or family treasures that remind us of people, places, or feelings from the past. Some may be more than nostalgic--they may be collectable or rare. The American Library Association has interesting information about old books called "Your Old Books" here. The Antiquarian Booksellers' Association of American, here, is another place for info on old books. Their convention is coming right up. Check it out here. A specialist in old children's books, Aleph-Bet Books, weighs in on the subject of buying old books on the internet here.