Go to the official Challenge site for details by December 31st on how to sign up and to get a coupon for $5 off any 2 Engine 2 products from Whole Foods.
You can also download the guidebook PDF file from Dropbox. If you don't have a Dropbox account, just ignore the window that pops up and the file is open right beneath it. It's very basic and geared towards beginners to a WFPB diet, but if you keep scrolling down you'll find an exercise guide and a few Engine 2/Essesltyn recipes and (my favorite) the Engine 2 Easy Meal guide. This handy dandy grid shows 42 different 3-5 ingredient no-recipe meal suggestions, like butternut squash and lentils with smoky chipotle seasoning served over rice and kale.
When you get to the bottom of the file where the links to resources are, be aware that the "new" book by Rip Esselstyn called Plant Strong is just a re-release of My Beef With Meat but with a few new and updated recipes added, and I'll assume a mention of the Engine 2 products in Whole Foods, something that wasn't around when the first 2 books were written.