I quit Absolute Write for nonpayment of services. Caution: I was stiffed for 8-weeks of work on Publish That Book: How to Write a Nonfiction Book Proposal That Sells, my online e-course. In the past I taught for Mediabistro, the Kiss of Death workshops and for Painted Rock.
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One of my students received a "very good" advance ($100K and up) based on her book proposal. Her agent said that there was nothing more to do, the book proposal package was so complete.