I'm Eternity, lover of dragons; artist, writer, and poet. I'm also Archeops on pixel cat's end. Feel free to paste my guides in your pet's bios too, I'd like them to reach as far as possible since there's no concentrated resources yet.
On accuracy, the recipe book is complete. I manually tried every single combination of ingredients. The summoning room guides may be less accurate since I haven't had the chance to summon everything too many times.