Age range 8 to 12 A fun-filled, action-packed activity book by Australia's funniest and best-loved maths dude! Adam Spencer's Enormous Book of Numbers is jam-packed with stuff to make, decode, deduce, descramble, dewrite and decipher! Counting has never been so cool. For close to 20 years Adam has been entertaining us. On triple j and ABC radio and television, he's established himself as Australia's funniest and most famous mathematician. Following on from the enormous success of 2014's Big Book of Numbers, this activity book is the perfect Christmas gift for readers aged 8 to 12.