1k+The Secret Life of Castle and Beckett » by AleciaB AU – return to the pilot episode. Imagine they did go to dinner to debrief and then kept their personal life a secret.
Castle, M, English, Romance, chapters: 108, words: 390k+, favs: 296, follows: 527, updated: 8h published: 3/5/2017, Kate B.
88Moments of Infinity » by bamboo72498 Collection of non chronological one-shots expanding on the 'Five Little Monkeys' world. Cover art credit to Angie (@Dtrekker on Twitter) Rated T for minor language and sexual situations.
Castle, T, English, Family, chapters: 47, words: 84k+, favs: 28, follows: 59, updated: 6/14 published: 12/9/2015, Rick C., Kate B.
18 Dream Come True by Trinity Everett Rick Castle sometimes couldn't believe that this was his life. A Take the Stairs verse ficlet. Caskett, Castle AU Fic.
Castle, K+, English, Romance & Family, words: 367, favs: 27, follows: 16, 8/4/2020, [Kate B., Rick C.]
422Return To Maine » by Purple Satin Rick has been on a 2 month book tour and their 8 month anniversary is approaching. Everything is fine until his calls and texts suddenly stops coming. Where is he and what is he up to?
Castle, T, English, Romance, chapters: 28, words: 62k+, favs: 74, follows: 165, updated: 4/27/2020 published: 7/5/2017, Rick C., Kate B.
824 Indelible » by Dmarx Years pass and memories fade with time but his words never will. Because he wrote them down, every chapter of their story inked across the page for eternity. Sequel to Spiral Bound.
Castle, T, English, Family & Romance, chapters: 30, words: 47k+, favs: 91, follows: 135, updated: 2/3/2020 published: 5/20/2019
97 One More Button » by mysterymuse What if Castle and Beckett stayed behind at the Old Haunt, alone, after everyone had gone? Post-Last Call AU.
Castle, T, English, Romance & Drama, chapters: 6, words: 12k+, favs: 114, follows: 277, updated: 5/27/2019 published: 10/6/2013, Rick C., Kate B.
570 Shattered Lies » by CheerfulChemist This is an AU story that begins during "Food to Die For." Castle finds something wrong with the way Perlmutter says that Wolf died. When Beckett checks out his suspicions, it leads to a much bigger plot. And there is Maddy Queller and Kate's growing uncertainty about Demming. Cover image by @Artifex Prime.
Castle, M, English, Crime & Romance, chapters: 54, words: 70k+, favs: 78, follows: 106, updated: 5/8/2019 published: 3/16/2019, Rick C., Kate B., Alexis C., T. Demming
1k+ One Of Us » by silentshutters What happens when Gates finds out about Beckett and Castle's relationship? How does Castle prove his worth to the Captain? Will he be able to stay at the 12th Precinct or will the partnership be broken? Starting sometime in mid Season 5 - pretty much fully AU from then on.
Castle, T, English, Drama & Romance, chapters: 85, words: 644k+, favs: 418, follows: 681, updated: 1/30/2019 published: 1/21/2013, Rick C., Kate B.
664 Near Light » by bravevulnerability "All I want this Christmas is just to be here, to remember. But if I can't do that… I want to make new memories, build new traditions to go with the old." An AU that takes place immediately after the events of 3x24, Knockout. Set during the Christmas season.
Castle, T, English, Romance & Hurt/Comfort, chapters: 12, words: 44k+, favs: 262, follows: 280, updated: 12/24/2018 published: 12/14/2018, Rick C., Kate B.
309 Just Like Fiction » by mysterymuse When Kate Beckett sublets a new apartment, the last thing she expects is to meet Richard Castle's spirit. Based on the film "Just Like Heaven."
Castle, T, English, Romance & Supernatural, chapters: 12, words: 52k+, favs: 144, follows: 245, updated: 11/13/2018 published: 6/12/2017, Rick C., Kate B.
28Becoming Real Partners » by WayofLife4587 This is a story about a former military and ex-spy. A man working as an NYPD detective for 13 years full time. This is a story about a man named Richard Castle and this is me peeling his Castle onion. (Castle Ficathon 2017)
Castle, M, English, Romance & Mystery, chapters: 6, words: 5k+, favs: 23, follows: 47, updated: 6/26/2018 published: 5/27/2017, [Rick C., Kate B.] [Javier E., Kevin R.]
210Vignettes 2 » by chezchuckles Continuing the three words prompt-fills from tumblr.
Castle, T, English, Romance, chapters: 16, words: 13k+, favs: 60, follows: 93, updated: 6/9/2018 published: 7/29/2017
979 Under New Management » by Perspex13 Beckett returns to the precinct to find that things have changed more than expected. Set early in Season 4.
Castle, T, English, Drama & Angst, chapters: 31, words: 134k+, favs: 181, follows: 292, updated: 4/10/2018 published: 1/2/2017, Rick C., Kate B., Javier E., Kevin R.
173 What Is Supposed to Be » by bingblot "Because he's supposed to be..." In love with her. Wait, had she said that out loud? An AU fix-it for 4x5 "Eye of the Beholder."
Castle, T, English, Romance & Friendship, chapters: 6, words: 28k+, favs: 132, follows: 201, updated: 4/3/2018 published: 2/22/2018, Rick C., Kate B.
276 The Other Side of Honor » by Pen to Paper Writer What would you do if you had the power to save someone's life and give them the closure that they are so desperately seeking? Would you do it? Richard Rodgers was a committed and honorable soldier. With his beliefs, there were no gray areas only black or white. On one disastrous day that had all changed and he was now doubting his purpose in life. Until he met one Kate Beckett...
Castle, T, English, Hurt/Comfort & Drama, chapters: 27, words: 107k+, favs: 72, follows: 104, updated: 3/18/2018 published: 8/6/2017, Rick C., Kate B., Martha R., OC
226 Unforgettable » by Lori2279 When tragedy strikes, sometimes help come from the most unexpected of places to help you pick up the pieces.
Castle, T, English, Drama & Romance, chapters: 51, words: 151k+, favs: 99, follows: 133, updated: 2/27/2018 published: 1/21/2017, Alexis C., Kevin R.
36Beckett's Perspective - Summer of Absence » by Hawkeye006 Beckett recollected her summer in self imposed exile and the reasons behind it.
Castle, T, English, Drama & Romance, chapters: 9, words: 7k+, favs: 18, follows: 59, updated: 1/29/2018 published: 6/27/2017, Rick C., Kate B.
74 The party of our lives » by Be-wrt Castle Ficathon 2017: The party of our lives AU Meeting- Kate is 19 years old and Rick is 24 when a party changes their destiny.
Castle, T, English, chapters: 13, words: 39k+, favs: 37, follows: 71, updated: 1/16/2018 published: 6/14/2017, Rick C., Kate B., Madison Q., Johanna B.
66 Green Card » by Be-wrt I don't own the show or recognizable characters. This is a fic about au meeting, not my idea KB was born in Australia; her parents were invited to work in a new firm in US so they moved when she was at high school. Months later her mom was killed and now Kate is a 27 years old detective at the NYPD and needs a green card
Castle, T, English, chapters: 10, words: 31k+, favs: 38, follows: 81, updated: 1/16/2018 published: 10/17/2016, Rick C., Kate B., Roy M., R. Karpowski
374 Anything could happen » by Pegship Goes off canon after 8x02. When Rick lands in the hospital after a traffic accident, he reminds Kate that anything can happen. "The best way to keep me safe, Kate, is to keep me close. Back to back, watching each other's six." Even while they're watching, they're racing to solve the puzzle of LokSat and Rick's lost summer.
Castle, T, English, Drama & Romance, chapters: 40, words: 56k+, favs: 137, follows: 310, updated: 12/21/2017 published: 10/7/2015, [Rick C., Kate B.] Alexis C., Martha R.