Reading Lists click-throughs: in a recent (#221) post Emily Lloyd (Shelf Check) refers to 100 Must-Read Books: The Essential Man’s Library on The Art of Manliness. I love reading lists like this that reflect personal opinion. They don't have to be right, wrong, or all-inclusive.
One of the comments had a pointer to the Marine Corps Professional Reading Program (click on Reading Lists in the right-hand column), the latest version of a tradition that's been around since the 19th century. Fascinating!
Here's the 100 Must-Read Books: The Essential Man's Library on Amazon.com. The blog post has great photos of vintage books, but the Amazon list is much faster, so you might prefer it if you have a slow Internet connection.