Puzzle Media, the company behind logic puzzle phenomenon Su Doku, is expected to be sold later this year for an estimated £100m. This is almost a 300% increase on the £36.7m that was paid for the business when it was acquired in April 2002. Puzzle Media is majority-owned by private equity firm ABN Amro Capital, and as well as Su Doku it publishes titles such as Woman's Weekly Crosswords and Kriss Kross.