Andy Griffiths and Terry Denton began their creative partnership with Just Tricking! in 1997. Eight Just books later and more than a million copies sold, they have also created the bestselling The Bad Book, The Cat on the Mat is Flat and The Very Bad Book. Their phenomenal and record-breaking Treehouse series is currently captivating readers across Australia. In 2015, The 65-Storey Treehouse was the fastest selling Australian book ever, and the best selling book in any category. Every title in the Treehouse series has won an ABIA award.