Steven Hassan is a mental health counsellor who specialises in helping families of people involved in cults. Steven is an ex-Moonie.
He has written various books including "Combating Cult Mind Control" and "Releasing the Bonds". These books may be beneficial for you to read as opposed to your husband as they provide advice on dealing with a cult member and methods to help him to change his thought patterns and recognize matters as they really are.
Your husband will not consider anything to be wrong with his thinking or beliefs so he would likely be opposed and resist reading anything such as the book you gave him, that suggests there is something wrong with him or the JW religion.
To remove someone from a cult usually means working against the person's will. Unless your husband recognizes for himself the inconsistencies and wrongness of the religion, expect any success will be a long process that will sometimes involve two steps forward and three steps back.