One key to save the worlds ...Ben, the Bengal cat who has defeated warlocks, and his trusty dragon rider companions have a problem.They've lost a magical key which the evil Warlock Prince can use to annihilate everything in all seven dimensions. Problem is, no one but him seems to know where it is.Now the Warlock Prince plans to recover the key, thrusting Ben and our dragon riding heroes into a a perilous battle against evil, demons, and themselves.A Cat's Guide to Vanquishing evil is the sixth book in a much loved series of adventures, where not only humans befriend dragons, but cats (and a dog) too.