Stephen King on mind altering drugs is what first came to mind when I got into this book. It is dark and disturbing.
The world is impacted by an apparent mental disorder, the "Gets". Luke and Clayton Nelson, estranged brothers are the key players in this bizarre book. Luke is damaged but reasonably normal. Clay, a savant, is flat out impossible to describe. Narcissism does not begin to describe his self centered egotism.
Al Sykes is Luke's Navy minder and appears to be accepting of the abnormality featured in the book. The world is pinning its hopes on Clay's work in the depths of the ocean. (thus the Deep) Lunacy is prevalent in the book as well as all manner of psychopathic behavior. Considering the way Luke and Clay were raised, psychology aberrant behavior would be expected as opposed to not.
I found the book hard to read and did not enjoy it.
This book may have been received free of charge from a publisher or a publicist. That will NEVER have a bearing on my recommendations.