Sell your non-fiction book before it's written. Agents and publishers only require a strong proposal and writing sample in order to sign on your book. If you sign, you could even receive an advance. Shopping around a non fiction book proposal prior to writing the complete manuscript--will help you assess your book's chances on the market and your most effective angle. Don't waste all your money and time paying a writer below market for a complete manuscript; doing so will cheapen both of your labors. Get your book written, right. Special rates for guru clients. Book proposal packages could also include features such as complementary magazine pitches or posts in my blog column in The Huffington Post.