I would definitely be interested in a blog post about it. From my own experience, here is the link to lulu book sizes. The closest would be Digest (5.5" x 8.5") or Small Landscape (9" x 7")
Do you know of a good service for printing 8.5" x 5.5" booklets in print on demand? I've only had experience with Lulu before and it doesn't support that paper size horizontally, only vertically.
