That is such a great book. Read it a while back… I imagine the modern version is every bit as good. I don’t remember it ever getting boring, but if it does, push through! It’s worth it.

Jon Skeet also has a (now old) blog series called edu-linq that basically implements linq just using generator blocks and it really makes you think about stuff like validation of arguments vs actually doing the operation. It’s very interesting. A couple of caveats in there.