Speaking of Dan Fenton I have a copy of
this book that has a number of recipes for investment. I haven't vetted much of the content with real-world experiences yet. I still don't have access to the proper equipment.
I also have
this one. It's a good source for general knowledge of kiln work across the spectrum, but I have issues with some of the firing schedules.
The Graham Stone book is at the top of my list right now of needed acquisitions.