If you're looking for popular Castle fanfiction, this story is for you!

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1. That Star Fall Down

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2. Observe and Detect

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3. Domesticity

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4. Kevin Ryan is a Better Detective than His Personal Life Implies

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5. On Tuesday

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Tap the link for the rest of the Castle fanfic stories!

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If you're looking for popular Castle fanfiction, this story is for you!

1. That Star Fall Down

The main relationship in this story is between Javier Esposito and Kevin Ryan and takes inspiration from Death on the Nile by Agatha Christie.

2. Observe and Detect

The romance in this story is once again between Esposito and Ryan, but it is not overly romantic. There are moments of love and playfulness, but also comedy.

3. Domesticity

This fanfiction tells the story of Esposito losing his apartment. Ryan debates taking him in and ultimately decides to do it.

4. Kevin Ryan is a Better Detective than His Personal Life Implies

In contrast to the previous story, in this fanfiction, Esposito takes in Ryan temporarily while he deals with his breakup. Even after Ryan can move back into his apartment, he still spends nearly all of his time with Esposito.

5. On Tuesday

In this fanfic, we get a better look at some of the other major Castle characters, including Esposito and Ryan. Kate and Richard also play a major role in this story, and the reader gets to see the dynamics between all four of these characters.

Tap the link for the rest of the Castle fanfic stories!