Ah, Mao Mao is very much a cat. I love her character, it is just so different from most heroines. Also the way the information is twined together is great for intrigue. Half the time you don't even know the full mystery until you've read everything. I am also going to buy the novels. You can get them on Amazon Kindle for about $7 (On the Kindle App).
Kusuriya no Hitorigoto