The profit margins are high. Easy to ship, and the post office has a low book postage rate.
Books can be drop-shipped by reliable suppliers.
You need to know the sources that will give you the best possible deals. Lee Howard gives you the benefit of his 15 years experience in the book business. Everyone who has ever thought of selling books by mail needs this publication and this includes hundreds of thousands of opportunity seekers and mail order dealers. It lists over 500 sources for books for the mail order dealer or retail book store. Ask a successful mail order dealer where he buys his material, how much he pays for it, etc.