An okay book but I found myself feeling disappointed when I finished. I feel like it covered the Undertaker's career up to 1999 way too briefly and superficially, even for what seems to be only a brief overview. At times I felt myself getting a bit bothered by the fact it kept treating kayfabe moments as if they were legit (for example, saying that Paul Bearer and Undertaker had lost respect for each other behind the scenes). Also I strongly disliked how it practically dismissed certain key moments and feuds of Undertaker's career purely because he wasn't chasing the title. Seeing his feud with Mankind from 1996 be simply shoved aside as if it wasn't that important really annoyed me.
If you see this book for cheap, I would suggest picking it up if you want to educate yourself a little on the earlier years of Undertaker's WWF run. But honestly I would just suggest watching some Youtube videos and educating yourself via all the other means the internet provides