Reading . Salinger's The Catcher in the Rye has practically been a rite of passage for teenagers in recent years, but back when it was published in 1951, it wasn't always easy for a kid to get his or her hands on it. According to TIME , "Within two weeks of its 1951 release, . Salinger’s novel rocketed to No. 1 on the New York Times best-seller list. Ever since, the book—which explores three days in the life of a troubled 16-year-old boy—has been a 'favorite of censors since its publication,' according to the American Library Association."
Several nonfiction books on the life of Mary Shelley also confirm Dippel as a possible influence.   In particular, Miranda Seymour finds it curious that Mary speaks of "gods [making entirely] new men" in her journal so soon after her travels through the regions surrounding Castle Frankenstein;  if rumors indeed existed throughout the area that Dippel experimented on cadavers in an attempt to create life, Seymour argues, Mary's phrasing could be more than merely coincidental. For now, however, the connection remains a subject of an ongoing debate. 
The book doesn't specify if the monster was created by one man or several or how he was brought to life. I think we can safely guess that the monster was brought to life using electricity because it has such an influence on Victor. SPOILER ALERT. I would also say that is safe to say that the monster was probably created using more than one man because later on Victor tears apart/destroys the monster's companion before he completes her creation. These are just my thoughts and if anyone has anything else they would like to add please comment