FeatherBy: M. G. Leonard Series: The Twitchers The Twitchers have one last mystery to solve and this time it's a heist! The final unputdownable adventure in the bestselling birdwatching detective series from the internationally acclaimed author of Beetle Boy and Adventures on Trains, wildlife queen M. G. Leonard. On a school trip to the Royal Swan Natural History Museum, Ava finds herself at the centre of a heist: hundreds of invaluable bird of paradise