New York Times Bestselling Series. The bestselling series of slow cooker books of all time. Here are the best-loved healthy slow cooker recipes all in one place. Whether your body responds best to a gluten-free, vegan, paleo, low-fat, or low-sugar diet, you will find dozens of easy and delicious recipes that will make dinner a snap. Everyone wants to feel like a smart cook, but it’s tricky when you’re navigating food sensitivities or allergies, different ages, and different dietary needs.