I got a paperback from a friend back in 1990-91 and really enjoyed reading it. I haven't been able to find it since. I dont remember all the details, because of the time that has passed, but it was science-fiction. The story is about a teenage boy who's father is a test pilot, and gets hurt pretty badly in an airplane crash. The doctors have to graft, or reattach an arm to the fathers chest so that he can write to tell his son about an underground warehouse where he has stored some things. The main thing in this place is an old Harrier jet. I though the name of the book was Harrier, but no luck searching that title. The only character name I can remember, is the kids dog, Tripod. They called him tripod because his dad was drunk or something, and shot one of the dogs leg off with a shotgun. Any help would be greatly appreciated. Thanks for taking the time to read this.