welcome to the board "allalongthewatchtower".
I strongly recommend you get a copy of Crisis of Conscience and In Search of Christian Freedom by Raymond Franz. Also Apocalypse Delayed by James Penton. Those books should help summerize what is wrong with the Jehovah's Witnesses.
But be forwarned, if your wife is studying with them, they already warn her about persecusion from family members. So go slow and appeal to her critical thinking and love of family.