Proteins such as salmon, sardines, mackerel, steak, bone-in pork chops. And when it comes to chicken, get thighs! The dark meat is the best. Doesn’t dry out near as easily.
If you like walnuts and or pecans, look up some seasoning recipes. Pecans are very versatile when it comes to being baked. They’re great with savory seasonings or candied.
The vast majority of my recipes are paleo/ keto combo. But not strict keto. Tried it and hated it.
This cookbook, Made Whole, is still one of my favorites. I’ve gifted it a few times. The recipes are fantastic, but there is also a load of information in the book.
The Castaway Kitchen website by Cristiana Curp is awesome for dairy-free recipes.
https://thecastawaykitchen.com/recipes/?fwp_diet=keto She also has a couple recipe books. My favorite is: Made Whole https://smile.amazon.com/dp/1628602945/ref=cm_sw_r_cp_api_glt_i_7DY2TV90D9R7TTKK0ZAS
Melissa Joulwan's Well Fed and Michelle Tam's Nom Nom Paleo are where my brain immediately goes. They're paleo and (mostly Whole30), but have a heavy focus on eating real food and not a whole lot of desserts. They do, however, feature sweet potatoes and such on occasion.
Personally, I'm waiting anxiously for this book to come out, but I think that would probably be above the price range you're looking for.
You might do better to just find a collection of recipes you can keep printouts of, or even something like the one week meal plan.