gnosticism

true and why? 1. From History - Jesus of Nazareth was executed by crucifixion [1][2] 2. From Judaism - Jesus of Nazareth was executed by crucifixion [3] 3. From Christianity - Jesus of Nazareth was executed by crucifixion [4] 4. From Gnosticism - Jesus of Nazareth did not die in reality, but...

I'd like both secondary sources and a couple of books with documentary texts. I'm moving beyond the Nag Hammadi library.

What is that? what does it mean? How old did they predict it was? I know the Gospel of mary is part of it Thomas and Philips but what else is part of this? earlly Christianity.