She finally pushed him too far. Not over the edge, but close to it. Realizing just how close that is, she does the only thing she can think of to save them. (Post 5x21 AU)

(Pre-Caskett total AU) A job. That's all it was supposed to be. Something to pass the time and help pay the bills. Waitressing at The Old Haunt, a nice quiet bar, seemed easy enough, at least until enrollment at the Academy started. She wasn't supposed to meet anyone that special. Why did she have to meet him?

She gave up everything for something that she just lost. It was her all or nothing. Now that it's gone, she realizes just how much she gave up, and how much of it wouldn't just sit around and wait for her to come back. Especially not him. (Post Watershed[5x24]) *COMPLETE W/ 2 PART EPILOGUE*

Castle-inspired Christmas one-shot: Lily has some fun playing dress-up with Daddy on Christmas Eve and Kate can't wait to give him her Christmas present.

(7x06 AU) Instead of sending him home, the artifact is shot out of Castle's hand, breaking the artifact and leaving him trapped in the world where he and Beckett never met. Stuck in a world where nothing is right, Rick is torn between convincing this Kate that they belong together and trying to find a way back to his own. [Castle Fanfication 2019]

(4x01 AU) "You don't remember... the gunshot?" Rick says, letting cowardice guide him as it always does with her. "No, I remember I was giving the speech and everything just went black." What if she was being honest and really didn't remember her shooting? [COMPLETE W/ EPILOGUE]

(Post 47 Seconds) She knows she made a mistake, one that she was hoping would fix itself over time. But her first case comes back to haunt her and she's up against too much to go it alone. She needs him back. {COMPLETE W/ EPILOGUE}

I don't know what happened. I don't even know how. One minute, I'm in the best relationship of my life and the next... I feel as if I'm on the verge of losing him altogether. All over this Erica Vaughn. (Role reversal of 5x22 and AU)

(S3 AU) "Brattleboro, Vermont?" Beckett asks. "Yes, ma'am. I'm calling because you're listed as the emergency contact for a Richard Castle. I'm afraid we have some bad news." *COMPLETE*

A dark, deeply buried secret from Castle's past resurfaces just as a case involving someone close to her puts him at odds with Beckett. (Set late Season 3)

She jumped in, ready never to look back. She just lost everything she's supposed to care about, but she only cares about her partner. And now, she's ready for the relationship she's truly wanted. (Immediately post-Always AU) *COMPLETE*

She learned long ago that loving was worth running the risk of losing it. A hard-won, uphill battle to open her heart and demolish those walls. But she just had her own son, the light of their new life together, stolen from them. With the fight to get her son back, those walls are coming back. (COMPLETE W/ EPILOGUE)

When Castle finally loses hope and starts pulling away, he decides to go on one last case with Beckett that takes them to upstate New York. Tensions quickly begin to rise as she fights to tell him how she really feels. (Mid S4, COMPLETE W/ EPILOGUE)

Castle is paid a visit by a strange, mysterious visitor who shows him what their lives would look like if he'd never met Kate Beckett. (ONE-SHOT/ COMPLETE)

Post Knockout (3x24) AU- If his feet were faster, if his reaction was quicker that day... much would have been different. An emotional take on if Castle had been just one second faster that day in the cemetery, and had taken that bullet. (COMPLETE W/ EPILOGUE)

This is the M rated chapter insert for Leave the Light On that goes between chapter 12 and 13. Coming back from recovery after taking a bullet for her, Beckett finally admits how she truly feels about Castle and takes him back to her apartment for the night. [Complete]

'She's never mentioned the name Richard Castle, and no one's ever asked. She's kept their past as far away from here as she can manage. That burgundy pillow sitting on her bed is about as much as she will allow herself. Some nights, it's all she deserves, others it's all she can get. But most nights, it's all she will allow.' Post Watershed AU (5x24) *COMPLETE*

Post '47 Seconds' AU. *COMPLETE* "If this is how she's going to treat someone she considered to be her partner..." He feels something inside of himself harden at the words that form in his mind, "then that's not the kind of person I want to spend the rest of my life with."

"I don't know. Somewhere along the line, Castle lost faith in me. He stopped trusting me. He's always been so accepting of me that I... I guess I never considered what would happen when I came back. And now that I am back, I don't know if there's a way I can convince him that what we had was worth fighting for." Post 8x02 (Complete w/ Epilogue)