One of the issues is with my older-audience books, I market almost exclusively ebooks. For younger readers, paper copies are the way to go.
So while I'm running a bargain day for my ebook in about a week (stay tuned for that), I'm also introducing a coupon code for $3 off the paperback through the CreateSpace Store. Click here to purchase the book, use the code T6Z4KB6R.
This code will be active through March and I might extend it if sales go well.