Let's get this straight. I finished the text, not the entire book. I'm sure the essays that followed The Gospel of Judas are interesting and provide historical insight to the lost text, it doesn't further my pursuit of reading as many religious texts as I promised - a stupid idea last year, but I bought all these books so I better damn read them.
It's hard to "review" a religious text - especially one that is considered a "lost book" of the Bible. Especially hard when said "lost book" also has several lines of text missing. We also know the ending - "Judas answered them as they wished. And he received some money and handed him over to them."
So what this book offers is an unique insight to the times before Judas' betrayal. It even offers a hint that Jesus already knew and warned Judas of said betrayal: "But you will exceed all of them. For you will sacrifice the man that clothes me./Already your horn has been raised,/your wrath has been kindled,/your star has shown brightly/and your heart has [...]."
It's a new look at Judas Iscariot, the betrayer, as well as, Jesus the messiah. It's also no wonder why this text will never make it into any canon. Interesting read and you should definitely pick it up.