I would really recommend . It's a very candid but funny look through her journey. It really helped me earlier this year when I went through it again.
I've been through this twice. First from Christianity where even having a grandfather and three uncles and an aunt in active ministry and an very devout mother who played TV evangelists all the time didn't stop unanswered questions and problems when I began to study the texts and history of the texts and beliefs on my own. It was slower separation, much like Julia Sweeney, and as much of my study lead to texts in Judaism, that's where I went which likely dulled the issue. I spent over 15 years as a devoted student of Judaism and was welcome into the Noachide path until someone was pushing for full conversion showed us that the rosy vision and embrace we had been given were false. That one hurt far more as there was nothing to cushion our fall, my fall particularly as I'd spent so much time in study and in traditions to find out the very texts they said didn't matter proved to be the ones that shed the light. I felt utterly deceived and could no longer go back.
Thankfully, I had my partner there to help share the burden. I looked at my life and our lives as a family and worked out what was missing now that the Western Abrahamic concept of a deity was gone. What was missing, for us, was a grounding philosophy and traditions, and for me personally a lot of how I saw myself. Many others who go through this also feel a great loss of community, belonging, and for some even hope, but these and more can be gained back - the wonders of the Universe and of the world around us are still here, we just have to figure out which lens to view them through. In my journey, I fell back into what I do naturally and did a lot of research, connecting to other branches of my family history, and through discussions with others worked out what points of view and beliefs were still important to me and what other traditions we could move onto and grow into something better.
It was hard and very upsetting, I spent a good few weeks really off balance, but looking back over the last half year since then, I'm glad it happened. I have far more clarity in who I am and how I see the world and far less burden in having "a side" as it were. It's different and we're still finding our feet in this new view, but I feel we are now really us and really connecting - I actually feel better not being part of it and working on my own course than I ever did in it (which is saying a lot, I got a lot of pleasure out of the study and traditions before, it was a major part of my identity, but I now know I don't need to hang myself on that. Really, I just believe in one less God-being than I did before, with so many out there that seems very small issue, it's the rest that's tied into being part of a religion that's the real issue I think for most people.
I hope I have been of some help and that you come through this as well as many other have before you on this journey.