Much as in, The Language Instinct, Steven Pinker wields his colossal knowledge of language to pick apart and establish some modicum of rules and structure in the English language. His main target is how we mentally handle regular and irregular verbs. How do we change freeze to froze, or find to found? What's going on in our brains? How do people, especially children, cope with encountering new irregular verbs?
Let's face it - linguistics is boring, yet somehow Pinker keeps it fresh by constantly dropping fun bits of linguistic knowledge, pulling for all sorts of unexpected sources. Even so - he does continue to go back to many of the same irregular verbs (though in different contexts) over and over to drive home his points.
For such a dull subject, Words and Rules is actually quite the page turner, especially in the first half of the book. Chapters like, The Horrors of the German Language really help us understand how bad a language can be and help us appreciate that English, bad as it is in those dark, irregular corners, is actually a rather good language (from a rule-following standpoint). There is so much here to learn about your language if you are an English speaker, and this may even spark your interest in linguistics.