Raising Purity is available via Amazon, but it’s currently sold out. Amazon purchases books from publishers based upon need, so when a publisher releases a new title through Amazon, Amazon will often only purchase a few copies at the outset (they don’t want to get stuck with a bunch of copies they can’t sell). Once they begin to move a few copies, they start to order from the publisher in higher quantities. So if you’re interested in purchasing through Amazon, just go ahead and order the book and Amazon will send me a purchase order. It might take an extra week for you to get your book, but you’ll get your copy and it will help encourage Amazon to keep a higher number of copies in stock.
Otherwise, you can also purchase the book through Entrusted Ministries, or pick up a copy at one of the Harvest Bookstore locations. A 40% discount on bulk orders is also available.