Andy and Terry Denton began their creative partnership with Just Tricking! In 1997. They have now collaborated on eight Just books, the ground-breaking The Bad Book, The Cat on The Mat is Flat, the bestselling The Very Bad Book and now the phenomenal Treehouse series. The 13-Storey Treehouse, The 26-Storey Treehouse, The 39-Storey Treehouse, The 52-Storey Treehouse, The 65-Storey Treehouse and The 78-Storey Treehouse have all won ABIA awards for their category. The 52-Storey Treehouse also won the overall ABIA for Best Book of the Year - the first time a children's title has ever won this award.