"Breaking Bad" continues to be the type of show that just keeps on giving. Years after the show went off the air, finally answering who would live and who would die thanks to Walter White’s criminal escapades, fans still debate several key aspects of the program. There have been attempts to try and expand on the legacy of "Breaking Bad," from the Netflix original movie "El Camino" to the award-winning "Better Call Saul." (Just don’t ask us which show is better, because that’s too hard.) But there remain so many questions about "Breaking Bad" that we still have to this day, including this significant one about Walter, Hank, and the book left on the toilet tank.

Needless to say, there are massive spoilers for "Breaking Bad" in the remainder of this article, so stop reading now if you haven’t yet watched the show.