I was just thinking about this today. A lot of these titles can be used for other books too, and I think some would work better if they were given those titles instead. For example; while the Discovery's title is appropriate, because David did discover the Escafil Device, I thought that #49 should have been called the Discovery, not the Diversion. I mean, really. The Yeerks finally DISCOVER that their mortal enemies are HUMANS, so you'd think...You know...Yea...