I must admit that I'm miles behind in 'Bittersweet Potion' (I've read only the first book. *sigh*). But what I've read, I loved.
Also, I must say it's the first time someone mentioned my being Pole at all, not to mention in a positive way. To be true, most people react to where I leave with the Internet version of a blank stare (a long pause and changing the subject).