I've spent years reviewing books from "both sides" and none are perfect. But on balance, the conspiracy books rarely stand up to even the most basic fact checking.
They Killed Our President: 63 Reasons to Believe There Was a Conspiracy to Assassinate JFK (October 1, 2013, Jesse Ventura with Dick Russell & David Wayne) https://www.goodreads.com/book/show/17593244-they-killed-our...
You don't get a 99% conviction rate by being honest, I would say this wouldn't be a great choice of person to put ANY faith in really. I MUCH prefer Colin McLaren's take, an ex police investigator who took on the "case" in his retirement as if it were any other cold case in his book, JFK: The Smoking Gun.
[1] https://en.wikipedia.org/wiki/Vincent_Bugliosi [2] https://www.amazon.com/JFK-Smoking-Gun-Colin-McLaren/dp/1743...