And what book for improv would that be?
I don't know yet any book, but if I have learnt by just reading Ted's posts, it sure can be possible!
Of course a good teacher would be better than any book.
My recommendations when learning to play popular music is to listen to as many music as possible, and, when you like something you hear, go to the piano and try to transcribe it. All the answers are in the recordings when it comes to jazz.
Lucas