Digi-know?: The Official Book of Digimon Facts and Fun was a tie in book which was published in 2000 by Acholastic in the USA and published in the UK by Puffin books in 2001. The bookis based arouynd the Digimon Adventure television series featuring the characters and Digimon that appear within it. It seems to have been published some time before Kari Kamiya was discover as the eight Digidestined as there is no mention of her or her Digimon within the book.