I have put a book for sale on leanpub that I hope is a useful intro and tutorial on C and pasm programming for folks who know spin and want to speed things up.
You can read a free sample (first two chapters) and purchase the whole book if you are interested.
I implement a "Delta-compression" algorithm - first in Spin, then in PASM, then in C.
As you have comments and corrections I will update the text on leanpub and you can download the updated book for free (leanpub also has a 45 day refund policy if you are unsatisfied).
The code (spin and pasm) is on github.com/sanandak/propbook-code - please feel free to download/fork and send pull requests...
Attached is the table of contents...