"The seven books reference Purgatory, praying to Saints, Our Lady, etc. etc. In short, the reason the seven books were removed were because these books contain many things that Protestants do not believe in - so they got rid of them."
Hardly. The books are OT-time period Jewish wisdom books and historical accounts. There IS an account of praying for the dead, but all the rest is not there.
Have you read them?
The fact is, they were removed from the NKJ version. Some will say they did not belong etc. etc. but that does not change the fact that they were there and later removed from non-Catholic Bibles.