This is pretty amazing. Paige from Playscapes, the playground design and history blog, has acquired publication rights to M. Paul Friedberg's long out-of-print 1975 DIY classic, Handcrafted Playrgounds, and has made it available again as a PDF. It's just six bucks, too. A great idea, and a great deal on a great book.
Handcrafted Playgrounds by M. Paul Friedberg [playgrounddesigns, thanks paige]
Only $0.05 over the original cover price which accounts for inflation and the need to fund the legal war chest for defending depictions of kids swinging hammers, using power tools, no eye protection, etc.