Reddit mentions of Fatal Vision: A True Crime Classic

Two come to mind: Fatal Vision and Devil's Knot

The first true crime book I ever read was Perfect Victim: The True Story of the Girl in the Box about Colleen Stan who was kidnapped by a husband and wife, lived with them for 7 years as their "sex slave" and eventually their baby sitter, and even was allowed to visit her parents once during her captivity until eventually his wife told her that everything she believed about her captivity was false. It was a fascinating read.

I also recommend Fatal Vision about Dr. Jeffery MacDonald who hired a writer to write his side of the story of the murder of his wife and two children while he was at home. The writer eventually comes to his own conclusions about the case and ends up getting sued by the Dr. himself. A Wilderness of Error by Errol Morris takes a different take on the case than the first book.

And lastly you should read Helter Skelter about the Manson Murders written by the prosecutor Vincent Bugliosi. Another fascinating book with a ton of detail.

When it comes to great true crime and other books about Jeffrey MacDonald, I'd add Fatal Vision by Joe McGinniss for OP. I picked that up after reading a previous thread in this sub. I haven't read the Errol Morris book, but I know they come at the case from different angles.