The RV Book by Mark Polk, 274 pages, $19.95, Score 25. This was my first reference book and one that I had previously recommended to others. I thought I would find a book that was more comprehensive but in the end this was the clear winner. It has lots of pictures, diagrams and checklists. This is the only general RV book that specifically discusses folding trailers in several sections.

The RV Book by Mark Polk, 274 pages, $19.95, Score 25. This was my first reference book and one that I had previously recommended to others. I thought I would find a book that was more comprehensive but in the end this was the clear winner. It has lots of pictures, diagrams and checklists. This is the only general RV book that specifically discusses folding trailers in several sections.