Past Is Gone / Rule #1: Don't Touch Anything — James Valentine

Everyone agrees that TimeMaster's JumpMan 70 was a dud. It was too fiddly, and just didn't meet the TimeJumping needs of the kids of Fifteen Billion and Seventy-three. JumpMan is the definitive account of the disastrous launch of the new JumpMan Pro. It's all in here: the schemes of TimeMaster's Cheeo are laid bare, the astonishing adventures of Theodore Pine in the bizarre world of the Third Millenium, the vigorous efforts of Jules Santorini and Genevieve Corrigan to rescue him and return him to his own time. For the first time since the Big Bang, the true story can be told...