Partnering to market your book does not mean you need to have co-authors, it simply means you need to be creative in the ways you market your wares. Here are some easy ways to make partnering a success:

• Find other authors that have similar publications and offer to sell their book on your site alongside your own. Set up a deal where you make a percentage on the sale of their book from your efforts. You do the same for them. If you both have a website, you can feature both books giving a bigger boost to each other without having to put out more effort other than to list the book.
• Find a joint venture partner (JV) that has a large quality mailing list. Have the JV send out your offer to the list and split the profits. Most JVs like 50% if they have a fairly large mailing list and your book fits into the reason why they have the list in the first place. Be careful that you do not overstep any boundaries with a JV - the list is theirs and not yours.
• Partner with an association and offer to private label your book. If they have thousands of members, get them to offer your book under their label and split the profits. Most associations do not have the time to create their own publications and may welcome the opportunity to partner with you.
• Partner with independent resellers and have them add the book to their product mix. Be sure that your book is a complement to the product line they are selling.

Partnering is one of the best ways to increase your marketing efforts without doing much more than you are already doing.