Also, I reread Rework about 3 times this year. Always a good and quick read.
Unrelated comment, but I feel compelled to mention... I just moved to SF and read that book right when I got here, only to find out that Pirsigs son (who is one of the main characters of the book) was stabbed and killed at roughly 22 (I am 25) a few blocks from where I work. For some reason, that story really affected me and has changed the way I look at life. I highly recommend the book to anyone in any field.
Being an engineer amplifies its meaning.