The Uncommon Reader by Alan Bennett
This came through the returns shute at work and caught my interest. Basically, the Queen, while out walking the corgis, comes across a mobile library when the corgis run amok. Feeling it is only proper, she borrows a book and becomes an avid reader. This has flow on effects (she is never on time anymore, and starts asking people what they are reading!)
I found this charmingly enjoyable. I love the idea of someone like the Queen becoming so besotted with reading that the rest of the world fades. Through reading she starts to question and wonder about things, wanting to know more and regretting the missed opportunities she has had. For me, the end was perfect - especially since it is so unlikely!