Make It Fast, Cook It Slow: The Big Book of Everyday Slow Cooking
This was Stephanie O'Dea's first slow cooker book after her blog, A Year of Slow Cooking, went viral in 2008 when she used her crockpot every day for a year. Although her books do not have pictures, they are easy to follow recipes that do not use canned cream of X soup. Most recipes do have pictures on her blog. I've tried a number of them with good results.
More Make It Fast, Cook It Slow: 200 Brand-New, Budget-Friendly, Slow-Cooker Recipes
This was O'Dea's second book which included a few fancier recipes than her first.
In the Kitchen with A Good Appetite: 150 Recipes and Stories About the Food You Love
I just picked this book up today, but already several recipes have caught by eye such as Decadently Bittersweet Chocolate Ice Cream, Buttery Polenta with Parmesan, Easy Stovetop Macaroni, Peas, Bacon and Cheese, and Spiced Chipotle Honey Chicken Breasts with Sweet Potatoes. Each recipe appears to be accompanied by an amusing anecdote. For $3.03, I couldn't refuse.