A problem is solved for the protagonist when one character gets hit by Frederick Beale's car, after which he travels with the title character to the Enchanted Hunters.  
In a novel by Pia Pera the title character of this work is given a notebook so that she can communicate with her dead father Gerald.  Two characters are referenced respectively as "Schlegel" and "Hegel" in comparison to a woman in whose "natty little coupe" the protagonist travels for two years.  A problem is solved for the protagonist when one character gets hit by Frederick Beale's car, after which he travels with the title character to the Enchanted Hunters.  After finding out the title character had sex with the son of the director of Camp Q, the protagonist begins an affair with her. Eventually he finds her married to Richard Schiller, having earlier been abducted by Clare Quilty.  Told in the form of a confession edited by John Ray, Jr., this is, FTP, what novel about Humbert Humbert's obsession with Dolores Haze by Vladimir Nabokov?
In a novel by Pia Pera the title character of this work is given a notebook so that she can communicate with her dead father Gerald.  
Lolita (or Dolores Haze) (The update refers to Pia Pera's Lo's Diary.)