I have the two books (Book 1 is for Thriller NT AND Shocker 1 and Book 2 for Shocker 2)
I just got a scanner yesterday so I'm checking right now how to scan them and get the best results.
Book 2 is grey in grey, you can see a first example here:
Book 1 is Black on red, that shouldn't be that hard I think, but didn't try yet.
If you have any tips on how to get the best results just write it down here.