As committed as Robert Irvine is to executing top-notch dishes in the kitchen and giving struggling restaurateurs a second chance at success on Restaurant: Impossible Ambush (premiering Thursday, Oct. 22 at 9|8c), he's also a fierce fitness guru, dedicated to maintaining a healthy lifestyle and inspiring others to do the same. In his brand-new book, Fit Fuel: A Chef's Guide to Eating Well, Getting Fit, and Living Your Best Life, Robert breaks down the ins and outs of what it takes to "fuel your life": just a handful of "principles," including "Eat real food" and "Believe you can change."

Part cookbook, part pep talk and part handy exercise manual, Robert's brand-new publication doesn't just talk the talk of what it takes to get in shape, but it also walks the walk as Robert personally demonstrates how to complete some of the best moves, and explains the whys and hows behind them. And with his recipes for every meal of the day — even dessert — Robert proves that the journey to fitness success doesn't have to mean boring, bland meals. Think satisfying fare like Sesame Shrimp Chopped Salad, Roast Chicken, Vegetables & Parsnip Puree and A Better Carrot Cake.

Ready to jump-start your own fitness routine? You can buy a copy of the book now, but FN Dish is giving away five copies, each autographed by Robert, to lucky readers. All you have to do to be entered to win one is leave a comment below telling us which of Robert’s before-and-after diner transformations you like the most. Find them all here.

So, tell us: Which of Robert’s before-and-after diner transformations do you like most? Find them all here.

NO PURCHASE NECESSARY. Open to legal residents of the 50 United States and D.C., age 21 or older. Void where prohibited. Odds of winning depend on number of entries received.  Sweepstakes ends at 9:30 a.m. ET on October 26, 2015. Full official rules are available here. Sponsored by Television Food Network, G.P., 1180 Avenue of the Americas, New York, NY 10036.