The subject came up today (I didn't start it, but I took part in the conversation. We must be wearing him down.

One thing he particularly objects to is how can mutations increase the size of a genome, creating more complex species? (He's OK with mutations within a species, but not speciation. I've explained that the only real difference is time.)
So, can you guys recommend a short reading list?
A good introduction: one or two books that a layman could understand?
I might even read them myself. I'm into astronomy, physics & cosmology, but never found biology very interesting.
Thanks