What is “Prisoner on Hell Planet”? How is it similar to Maus? How does it differ?

"Prisoner on the Hell Planet" is a comic book within a comic book. This text within a text describes, in horrific detail Artie's failed effort to get through the painful loss of his mother due to suicide. The narrative illustrates Artie's stress, isolation, and sense of futility. One can see this as an allagory to the main text involving his father Vladek.