If you haven't read it already, read Q-in-Law by Peter David. LINK CONTAINS SPOILERS (Actually even the URL CONTAINS SPOILERS). Suffice it to say that Lwaxana ends up with the power of Q for a while and it's a blast.
I haven't, both because I haven't read a Star Trek book in years, and also because I really did not like Q-Squared, but maybe I'll check it out. Thanks.