Boutique or Farmers Market? Need more info.

This morning I saw the announcement for The Money Train, an eBook on e-comerce development with Rails by Ben Curtis. At this point, the book is in beta, and copies are available for $12. Right now, it's short (about 20 pages), but the Table of Contents looks pretty good. Hopefully this will blossom into a nice book for Ben and for the rest of the comunity. I don't have enough information yet about whether this book falls into my Boutique or Farmers Market category. On the face of things, I'm tending toward the Farmers Market though. Ben is releasing early to get things out into the community and he seems interested in getting community involvement around the book and its ideas.