Author Justin Richards brings is another great adventure of the Doctor along with Amy and Rory. This time the TARDIS lands in a tunnel on an asteroid that has held mines for centuries as well as deadly creatures in slumber. But one of the creatures escaped long ago and has been trying to find the tunnel that would lead to the nest of his hibernating friends. But what brought that creature to the asteroid was a carnival and it posed as a dancing monkey. Amy sees this and think that the human on the other side the leash has kept the monkey as a pet like it had in her era but unlike that monkey it has been going off into the off-limits tunnels. Also on the asteroid is a former general who captured the monkeys bigger brothers and has been making sure that the miners don't dig into it. This is a great Doctor Who novel, I highly recommend it to everyone.