I did not buy the following book as a textbook, but it could be used as such:

With the basic principle that creative expression is the natural direction of life, Julia Cameron and Mark Bryan lead you through a comprehensive twelve-week program to recover your creativity from a variety of blocks, including limiting beliefs, fear, self-sabotage, jealousy, guilt, addictions, and other inhibiting forces, replacing them with artistic confidence and productivity.

Here's the thing:  my book meets textbook guidelines, but I have checked off a bunch of the exercises I did, and wrote a note in the margins.

Would you post it, and let the receiver's know it's a textbook each time? Or would you just offer it as an unpostable deal?

Me too-unpostable, just to be on the safe side.

I thought it might have been The Artists Way! Love that book.

I actually would consider the book  a textbook (actually I think of it more as a workbook)  but that's just me and follow the guidelines for posting as such.

Unpostable.

I have that book, and if I were ordering it I wouldn't consider it a textbook. I say offer it as an unpostable.