Start with high-confidence slow cooking books, then narrow by subgenre or adjacent topics.
Half Baked Harvest Super Simple
Tieghan Gerard
Fix-it and Forget-it Revised and Updated
Phyllis Good
The Easy 5-ingredient Slow Cooker Cookbook
Karen Bellessa Petersen
Fix-it and Forget-it Slow Cooker Diabetic Cookbook
Fix-it and Forget-it Slow Cooker Freezer Meals
Hope Comerford