When I was studying the WT with my (much) younger siblings, I felt the need to help them get the Bible's viewpoint on the subjects discussed in the study articles; accordingly, we actually looked up and read the cited scriptures. After a few weeks (months?) of this, it became increasingly clear that the WT had a marked inability to read things in context -- indeed, many of the cited scriptures had little or nothing to contribute to the discussion at all! I was forced to reassess my beliefs as I continued to look to the scriptures. What was discovered was not a very pretty picture: much WTS doctrine/dogma has no foundation in scripture whatsoever. The book that convinced me that the WTS was most emphatically NOT the one true religion was the BIBLE.
I will say other books were helpful, also. Anybody here read Russell's "Divine Plan of the Ages"? (...and compared it to current "new light"?) How about Rutherford's "Harp of God"? The WTS is its own worst enemy. (Prov. 10:19)