Is this the wrong way to begin the following business idea?

I'm starting a new business and I want to know whether or not people think I'm going about starting it backwards. Here's the business idea:
I want to put together a book of freebies, from local businesses in my area. The businesses would get free advertising in exchange for giving something away to anyone who purchased my book. I'd sell the book for about $20 and my profits would be solely off the sale of the book. In terms of marketing the book, I'd like to work with non-profit organizations on a profit-split basis.
Is it backwards for me to contact the non-profit organizations BEFORE getting businesses to agree to go in the book? My thinking on this approach is that if I don't do it this way, I could invest a bunch of time getting businesses to agree to go in the book, and then, if I can't get non-profit groups to agree to market my book on a commission basis, I will have wasted a whole bunch of time for nothing.
The other side of that coin, however, is that I'm afraid that most non-prof. groups are going to want to know which businesses (and how many) are in the book before they agree to try and sell it.
Any suggestions on how I should go about this new venture would be greatly appreciated.
Thanks,
Joe Cooper