You might want to create-or-prove a demand in the marketplace; there might be another, new edition in play (Google thought that Agent of Change was out of print and fair game -- which it is, in the Del Rey edition. However, it happens to be very much in print -- as an ebook -- and will soon be part of an omnibus from Baen).

Having your book in print does you no good if you-the-author can't, as Steve mentions, benefit from its sale. Google is limiting how much I can benefit from the sale of my books through it; the Authors Guild will take another fee for adminstrative costs of its Registry; and the presence of a Google-edition may limit my ability to sell reprints elsewhere.