Do JWs have books besides the Bible that they view as "sacred" or "inspired"?

I see that the JW website contains the text of a few different Bible translations: KJV, ASV, Byington, New World Translation and The Kingdom Interlinear Translation. From articles such as "The Bible Really Is God’s Inspired Word" (here ) I can see that their view is that Bible is inspired by God. Do Jehovah's Witnesses have any other books, besides the Bible, that they view as "canon" (e.g. a separate/additional message from God) on the same level as (or higher than) the Bible?