Bookraft

Switchword is another of those very addictive word plus strategy games:

It is easy to learn but demands word crafting. I really like the strategy aspect; how you can reverse another's word by surrounding it or crossing diagonally. But you must pay attention because words can be created right-to-left as well as the normal left-to-right - ditto for up as well as down. If you get my drift - this is truly a word-thinking game.