I did it twice -- I hit "both" too many times the first time, and then I accidentally clicked away the whole thing and had to redo it, and the second time I made an effort to actually pick one over the other, and the results were rather different. The second time was much more in line with how I actually feel -- Spectred Isle at the top, followed by Secret Casebook, followed by the Magpie Lord trilogy, followed by Band Sinister. I was probably a bit unfair to Slippery Creatures since I've only read that once, and KJ's books tend to grow a lot upon rereading, when you notice all the details and the careful characterisation and plotting. But maybe also because it's just the first book in an incomplete series.