I've just finished this book this evening. It took a little while, even though it only has 226 pages and it used a large font.
I liked it, but it wasn't quite what I was after.
I'm interested in design By Contract (DbC). It sounds like one of those things that some know about, some understand, but very few use.
Would I recommend it? Well, um, yes and no. It's pretty easy to read, but it's a bit (or a lot) like a Uni textbook. Actually it wasn't a hard read, so yeah if you want to read something on DbC, then give it a go - but it's not in my top ten.