This did contain some time travel after all, but I thought I'd review it anyway. It's (broadly) another in the series containing The Portable Door, Earth Air Fire and Custard, The Better Mousetrap and You Don't Have To Be Evil To Work Here But It Helps. Its hero, Chris Popham, works as a sales rep for J.W.Wells' various products, ranging from the annoying (a book of all human knowledge that insists on telling him about Gandhi), to the useful (in the form of portable parking spaces), to... well no one has ever quite worked out what they use the dessicated water for, but it's certainly selling well.
Chris quickly finds himself not-quite attacked by demons, saddled with graduate trainees, and talking to his Sat Nav, which is talking back, and would quite like to get out of the horrible plastic box, thank you. As if that weren't enough, he's got his failing relationship with Karen to deal with, while his usually supportive friend Jill is doing a good job of dealing with the supernatural incursions, but getting remarkably preoccupied about some missing digestive biscuits.
It's good fun, though as usual quite baffling until Holt explains it at the end. The gags are as good as ever, and it's a fast paced read, even when half of what's going on doesn't make much sense. Holt plays with the business of being a sales rep expertly, and as usual my only slight annoyance is the time travelling plot, which seems to make a surprising amount of what follows only semi-relevant. Having said that, it only comes in towards the end, and doesn't detract from what are some very funny characters, so this is still very much worth reading.