"Pretty soon Charlie meets two very special seniors from his school with whom he soon becomes good friends with."
I'm not sure about this sentence. Are there any errors?
Extra points if you guess which book I'm writing about

Question

"Pretty soon Charlie meets two very special seniors from his school with whom he soon becomes good friends with." 
I'm not sure about this sentence. Are there any errors? 
Extra points if you guess which book I'm writing about

anonymous · Answer

This sentence seems fine to my eyes.
I would hazard a guess that that book is "The Perks of being a Wallflower"

anonymous · Answer

Correct Floydian!

anonymous · Answer

Your usage of whom is correct. To know why: http://web.ku.edu/~edit/whom.html

anonymous · Answer

The sentence is correct; however, 'pretty soon' is spoken English, and on paper, it's rather informal. May I suggest 'very soon'?

anonymous · Answer

Avoid ending the sentence with a preposition - the sentence is fine without that second "with", which is redundant.  I'd also drop "pretty" and "very", unless the sentence is dialogue and these words enhances the character's voice.  One "soon" should also be either replaced or dropped.  I replaced the second "soon" with "quickly":   "Soon Charlie meets two special seniors from his school with whom he quickly becomes good friends."