There's a series of The Cat Who...books. Usually charming, low-key, mildly witty,with a non-threatening, easy to solve mystery. Very much of the cozy, not a lot happens variety but familiar and a fun, easy, mindless read. However, I just finished The Cat Who Had 60 Whiskers and I'm afraid it took mindless too far. It bordered on boring. Oh well, it was a cute series while it lasted.