Title: Six Impossible Things (Links to first 17 chapters)
Characters: Castle, Beckett
Word Count: ~54,000 so far
Rating: PG-13 (minor language, minor nookie )
Spoiler Alert: Fic is set at the end of Season 4, but it's officially AU as of about "Dance With Death." There's nothing particularly spoiler-y for specific episodes. There are multiple references to and at least one spoiler (depends on how paranoid you are about spoilers-I don't read book jackets, so I'd rather be safe than sorry!) for the Nikki Heat tie-in books.
Summary: Beckett and the gang are investigating the murder of the would-be groom at a Fairy Tale wedding in Central Park. Castle's romance novel research (and his high adorability quotient) makes him indispensable.
Author's Notes: A work in progress. When I started, I thought this would be a a brief story with a bit of plot, ending in Casketty goodness, but it wants to be a case-based fic.
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 15 Chapter 16 Chapter 17 Or
here's where the whole thing starts at Fanfiction.net