I've put a "Buy Now" button over there to the right which will allow you to purchase this years Frontlist* collection of DMP titles.
25 books is what we're planning (should we not quite get there, you'll get a total of 25 guaranteed, we'll just carry it over to next year until we've hit 25!). At $399 it's a 40% savings over ordering them individually. They will be delivered to you over the course of the year as they are released! You'll be among the first to recieve them, and you'll never miss a book.
* Frontlist is an industry term meaning the new books coming out this year.