I love this book. It is about the history and strangeness of English. From English names to English words, statistics of how many people speak English worldwide and so on.
A few things I took away from this book and quote quite often - 1) English is strange 2) adding s isn't the only way to make a word plural (i.e. brethren and children) 3) people never pronounce the "t" in soften, even though people do with often 4) more people are learning English in China than speak English in the United States
And so on and so on. This is a real winner and I highly recommend it. It is quirky and looks at the subject from a sideways position giving many interesting and insightful views. If you've ever been interested in why English is the way it is, and why we say deer and not deers, sheep and not sheeps, spoke not speaked etc.. etc... then look no further.