Mystery Themes!

Tonight's show will feature two sets of songs, each of which has a secret theme. I'll update the playlist as we go, and listeners are invited to make guesses about what they think the theme might be. Maybe I can give a prize for anyone who's able to guess each before I announce the answer.
I'll start you off with the hint that both themes tonight are works of fiction.

Part 1:

Song	Artist	Album
Creep	Radiohead	Pablo Honey
Riches and Wonders	The Mountain Goats	All Hail West Texas
Baby You're a Rich Man	The Beatles	Magical Mystery Tour
Love and Longing	stellastarr*	Harmonies for the Haunted
There Is a Light that Never Goes Out	The Smiths	The Queen Is Dead
Drive My Car	The Beatles	Rubber Soul
Barrel of a Gun	Guster	Lost and Gone Forever

Congrats to Leo Pezzementi for being the first to guess this one.
Highlight below for the answer:
The Great Gatsby

Part 2:

Song	Artist	Album
It's a Crime	The Magnetic Fields	69 Love Songs
Eli, the Barrow Boy	The Decemberists	Picaresque
Building a Mystery	Sarah McLachlan	Surfacing
Teenage FBI	Guided by Voices	Buffy the Vampire Slayer Soundtrack
Listen to the Darkside	Charlie Mars	Listen to the Darkside
Watching the Detectives	Elvis Costello	My Aim is True
Veronica	Elvis Costello	Spike

Highlight below for the answer:
Veronica Mars