This popular museum adventure is now published in paperback! A fantastic collection of favourite Wally scenes challenging readers to spot over 500 differences, ranging from tricky to fiendish to diabolical!Join Wally for a day at the museum! Ogle at artefacts and gawp at galleries as you search for Wally and his friends. And that's not all: this brilliant book contains double the trouble, with over 500 challenging differences to spot! This is the ultimate test for eagle-eyed Wally-Watchers to experience the world of Wally in a whole new way!