Hi, as you may know, the Introduction to OS Abstractions book (aka 9intro) is avail in pdf in various places from the web. It will continue that way, btw.
But, as some asked for that and I think it's nice, it's also available at lulu.com. This is the url. http://www.lulu.com/content/paperback-book/introduction-to-os-abstractions-using-plan-9-from-bell-labs/7609919 hth
