Whoever controls underwear controls the world. Sir Hades Gousset - underwear magnate, king of the undies world, the biggest man in pants - has only ever seen underwear as a force for good. That is, until the mysterious Dr Hieronymus Mangler appears with a fiendish new technology that threatens Hades' monopoly and his grip on the world of nether-wear. Mangler's technology has more sinister purposes than business competition and his ambitions go beyond mere financial profit. The battle between Hades and Mangler for control of this vital undergarment becomes a titanic struggle for the soul of humanity itself, and leads to not just one, but two apocalypses, in a conflict that rocks civilisation to its foundation wear. The Underpants Tree is the second volume of The Underpants of Fire trilogy. The first volume is King of the Undies World.