I haven't used it myself, but it is on trend.
This platform brings readers together with writers and applies the crowd funding model.
It's branded as "PRETAIL" sales and could be the novel idea you need for your book.
"CrowdScribed is an online platform that brings passionate authors and readers together early in the process to publish better books. CrowdScribed utilizes the unique model of pretailing®- where consumers shop for products before they're available at retail - to measure interest, generate feedback, and fund books for publishing. The combined power of the authors' and readers' voices determine what books get" published."