Are you looking for a used or out of print soaring book?  I love old soaring books and have quite a collection of them.  I have added a few used and out of print books to this site.  I stock some of them.  For the ones I don't stock there are links to online sources for used books.  There are some wonderful online markets for used books which I have listed below.  Just do a search for the book or author your are interested in.

• alibris - This seems to be the best source for used soaring books.  It is an international site so be sure to note the country in which the particular book is located.
• Amazon
• Barnes & Noble
• ebay