A funny and enlightening romp through the world of numbers with one of Australia's best-loved broadcasters. By popular demand, Australia's funniest and most famous mathematician is back with a brilliant new book. Adam Spencer's World of Numbers takes the reader on a funfilled ride, explaining the crucial role numbers play in our understanding of sport and space, computers and cooking, and a whole lot in between. With his trademark wit, Adam decodes barcodes, explains why we say 'as sixes and sevens' when we're discombobulated - and works out if there really a word in the English language with 189,819 letters! This is a book for readers of all ages who love numbers, or just love to laugh and learn about the wonderful world we live in. For close to 20 years Adam Spencer 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, his new book is the perfect gift for Christmas.