I have a few of them; the one I seem to use most frequently is The Better Homes and Gardens Biggest
Book of Slow Cooker Recipes.
I know this may sound silly, but historically, I did not tend to use my crockpot cookbooks for inspiration. In other words, I did not wake up in the am, and use it as my go-to cookbook. I tended to decide what I was interested in making then try to find if it can be made in the crockpot. (I would then peruse all my crockpot cookbooks)
The BH&G cookbook does have some fun, inspirational and interesting recipes, on its own... Does that make sense?