Publish with a self-publishing company. They are also known as Print on Demand companies because they print books one at a time as they are ordered. Examples include Amazon's Createspace, Lulu or IUniverse. Most self-publishing companies provide online distribution to Amazon and other online bookstores, though some may charge extra for this service. Evaluate the publishing agreement before signing on.
Form your own publishing company and use the printer, Lightning Source, to print books on demand. Like self-publishing companies, Lightning Source automatically distributes your books to all online retailers. The difference is that you have more control over your books and you save money by eliminating the middleman and going directly to the printer.
Work with a distributor to get your books into bookstores. Distributors have sales representatives who visit bookstores and wholesalers to try to sell your books to them. Research distributors and approach those who distribute books similar to yours. Distributors handle all sales, take a percentage, and then send you a check every couple of months. Be prepared to market your book and demonstrate why a distributor should work with you. Many distributors don't take on self-published books.
Distribute your book to bookstores yourself. Visit your local bookstores and share your marketing material with the person who makes the decision about which books to stock. This works best with independent bookstores because the large chains such as Barnes and Noble prefer to work with distributors.
Do it yourself. Contact groups and organizations who may be interested in acquiring your book for their members. Visit any place likely to carry your books such as churches, gift shops, and specialty stores and pitch them your book. Create a mail marketing campaign for places you can't visit in person.