Thanks to fisher36 for this.
Strange to see a preorder discounted by 50%. Release date of 20 July & next nearest price seems to be £28
The Wii Remote controllers hands-on control makes playing a cinch. This rethinking of the popular Nintendo DS game will test players brains with fun problems and allow people of any age to play together. Multiplayer versus and co-op play modes also have been added, allowing players to use the title as a brain-training exercise or a raucous party game.