if i'm not mistaken
this book is mary shelley's first work, and was written as sort of a story challenge thing with her crazy pals. so this may account for some of its apparent linear single-mindedness tone. i think it was written relatively quickly. it definitely has a clear focus and theme, with not much attention paid to subplots. also, i think she approached it as more of just a "this is what happened," rather than "let me take you into this world"...sort of like simply a gothic ghost story campfire tale.
it's a fantastic novel, really.
the best part is when gene hackman pours hot coffee on the monster. that part rules.