I would love to, I absolutely adore looking into other's sketchbooks. Unfortunately I can't afford to spend even tiny amounts on non necessities right now. If I can get caught up and get to a safe place with my money I'm all over that shit though.
I choose "IDK" because I really don't know if it will be what I do think.
When you say sketches do you mind only doodles, unfinished works, processes from scratch to final work, all of them? Also a printed book would be great, but I know it's so much work to reach that point.
Don't take me the wrong way, I love your work, but I really enjoy other artists works when I can see the steps they followed to the nice, smooth and gorgeous final art picture.
It really comes down to Price v/ Content. However, I'm the kind of person that likes his books physical (for multi-tasking purposes, mainly), so I'd be more tempted to purchase a physical copy. You could always release it first as a digital download for an X amount, and if it's doing well, you could consider a physical hardcover version.