What happens when Kate and Rick meet in front of their children's school? AU

She has a baby. She brought a baby back from Haiti. Can you even do that? Season 3 AU.

"Seeing isn't believing. Believing is seeing." An AU story for Christmas.

Beckett is distraught when Castle seems to have finally given up hope on them ever being more than just partners, and he begins to pull away from her, prompting her to face up to her own feelings.

AU set in 2001. 1993 was a big year for both Kate and Rick. Eight years later they forge a friendship brought on by the friendship their daughters are developing.

"Her mind flashes back to his question – his invitation to the Hamptons. He's building up ideas in her head, painting pictures of a Fourth of July spent on the beach, fireworks and bonfires; relaxation and a break from the work she's thrown herself into even harder since Memorial Day. And it's tempting." A post season 2 AU in which Castle returns after only two weeks.

"What was his problem? Did he have no sense of justice or morals whatsoever? He just let a killer free and all he could think about was boobs." An AU Castle/Beckett story.

A four-year-old, a mall, and finding something you didn't even know you'd lost. Sometimes all it takes is a chance encounter for everything to fall into place. AU with echoes of canon.

A/U It's definitely not love at first sight. Prickly, aloof and strait-laced Kate Beckett isn't what Rick expected when he hires someone to protect a young Alexis. She's all business while he's all about the play. Shallow, irresponsible and a playboy is how Beckett would characterize her latest employer. But sometimes first impressions can turn out to be wrong.

Making the call might just have been one of the best decisions of his life, he thought, as he stared at his phone again like he had been for the past five days. (AU from the S2 finale.)

Kate was only looking to spend time with her son at the park, but what found her there was a chance to meet the man that saved her years ago. AU. Complete.

AU. Detective Kate Beckett is separated and raises her son alone. She meets Richard Castle by accident, literally, on the tenth anniversary of her mother's death, turning her life upside down.

Something happens to completely upturn the lives of Castle and Beckett, throwing them into an adventure that tests and pushes them to their extremes. Mystery, action, and love ensue.

Castle has a Karma problem that he hopes Beckett can help him solve. Reluctantly, she agrees, but will the secret mission they embark on change more than just Castle's bad luck? J.R. Challenge fic. A little light fun for a change. ON HIATUS

Shot, hospitalized and confused, Katherine Beckett wakes up to a changing future. Richard Castle wants to protect her, love her, save her. But there are things she must face, and she can't make him the promises he needs. Post-Knockout continuation.

Picks up beginning of Season 3 at an important time in Beckett's life. Castle's back and complicating things more than she expected.

It was a summer's night and the smell of the old rose bush was as heavy as rain. Under the light of the moon and guidance of the stars, two friends finally take that step into something more.