I hope so too. I consider it more than appropriate compensation for your tutorial creating hard work. You hit several tropes and themes in the sample pages I read that had me going, "yeah I'd read the rest of this book." And the things reviewers were saying had me hyped for it.

My advice? Shoot for the moon, include links to all 3 books from your call to action and assume someone who will read one book might want all of them. =P I had to search for the other two. Someone less diligent might have assumed you'd only produced book one if all they encounter of you is just one of your brush sets with a call to action to buy your ebook. I almost did, but then Amazon didn't give me free shipping and I was like "but it says book ONE" and doubled back and found the other two.