They belong to your family's library. They are your samples and are therefore, a tax deductible expense. Some consultants have acquired a small inventory of the most popular titles which they keep on hand as a customer service. This is not a requirement. There are supervisors who have been in the business since almost the beginning who don't keep any inventory.
Some consultants have a large inventory.
I've heard that some of your books can be purchased at book stores or department stores. You will certainly find some of our books in retail stores, but probably a very limited range. Usborne consultants, on the other hand, have access to the complete line of Usborne Books. These are books feature from 3 to 7 titles from a particular series, bound in one volume, and are available at a substantial savings. Home office has a growing selection of audio and video training tapes.