I am a voracious reader, so I figured I'd just give her a list of books I'm interested in reading, so that she can go through 'em and buy whichever ones she pleases.
That being said, I'm turning to the smart and savvy users of HN for book recommendations. Lately, I've been on a non-fiction kick. I've been particularly interested in the biographies of the founders of major tech start-ups, or the history of how they got started. Broadly, however, I'm interested in stories about tech entrepreneurs (disruptive entrepreneurs, contrarian entrepreneurs) or the tech empires they've made.
I've also decided to start learning how to code in PHP. So, any good books on PHP are also recommended.
However, your recommendations don't have to be confined to those interests. If you read a book and were particularly floored by it, put it in your list!