This is interesting. I've followed this group and enjoy the novels they wrote. I was also in touch with Peter Levenda who is one of Tom's co-authors on Sekret Machines. Peter's books in his own right are fascinating, well researched and reveal a whole dark side of the US.
Here are a couple of answers he gave to a whole list of questions I had and that are pertinent to this subject.
"Briefly in response to your question, volume 3 of Sinister Forces contains a few chapters that focus on QM, citing Penrose and Hameroff, Jung and Pauli, Grof, Sarfatti, etc. In addition, the book I co-authored with Tom DeLonge and coming out next year -- Sekret Machines: Man -- has lengthy chapters on QM, consciousness studies, etc.
The authors he quotes above provide great reading and research material.
He also said this. "The whole UFO area is awash in conspiracy theories, fantastic statements without factual basis, and the like. It's counterproductive, and the reason why so many reasonable people have avoided the UFO field like the plague. "
I tend to agree with this statement from him, so I join you in being sad that Elizonda and Mellon have left TTSA. It will be interesting to follow along and see where their roads will now lead.