Christianity in the true sense does not involve worship/adoration the Bible, it is to worship the Creator who authored it. Knowlege of the Bible leads to a better understanding of the past, present, & future and a better understanding of our Creator.
If you wish to say that some have erred in that they have worshiped the book instead of it's Author you would be correct. That too is a sin.
To be a Christian literally means to be like Christ, to follow His example. The Bible (along with prayer) reveal that example and path to any that wish/desire to know. Those who don't wish to know or cling to other hopes and dreams are left in darkness.