Tom and Sophie Nightingale live on a barge with their zookeeper dad and vet mum, and as many animals as you can get on a small boat. Surely there''s no room for any MORE animals in their life? But then there''s a bat in peril, an owl on the prowl and an outbreak of night-terrors for the zoo''s nocturnal residents. Tom and Sophie must stage a moonlit vigil to discover what''s going on!

An animal-packed caper written with the help of the brilliant team at London Zoo.