Have you read Promise? If not, the ebook is FREE only through Monday, 11/29, at https://www.smashwords.com/books/view/19238. All ebook and computer formats, including Kindle and Nook.
Read up before Purpose comes out in a couple weeks. The reviews are just starting to come in and Books with Bite gives it 5 Bites! Read the review here. Then go pre-order Purpose here.