A lucky find on eBay. At the time this was written and published, SEALAB III had yet to take place, so the book ends on an optimistic note… Which is unfortunate as SEALAB III was a disaster – while struggling to fix a leak in the habitat, which was on the ocean bottom 600 feet deep, prior to occupying it, one of the divers died, possibly as a result of sabotage. It was enough to stop the programme. And this despite SEALABs I and II being very successful (and Mercury 7 astronaut Scott Carpenter was involved with the second one). Project SEALAB is a somewhat simplistic run-through of the two habitats (well, it is a “junior” book), but it’s copiously illustrated with photographs, which is pretty cool. Incidentally, there are a pair of US Navy films on the two projects, and they’re available online – SEALAB I here and SEALAB II here. ( )