Welcome to CR0 Tolns. I too really started my curry journey with Pat Chapman's books. I remember reading the recipe for Ekoori. So so long ago now. There are quite a few versatile bases posted on here that can be used for the mildest to the hotest dish, CA's, Chewytikkas, Abdulmohed, Razor's to name but a few. And there are many more. Read the reviews and see which one ticks all the boxes for you. Enjoy.