I think Fi Kinebuchi and Sasha Keyes fall in love in Nicola Barker's book, "TonyInterruptor

 As of now, there is no publicly known book titled "TonyInterruptor" by Nicola Barker, nor any characters named Fi Kinebuchi or Sasha Keyes associated with her work.

Nicola Barker is a well-known British author celebrated for her quirky, experimental, and character-driven novels, such as:

• Wide Open

• Darkmans

• Clear

• H(a)ppy

• I Am Sovereign

These books often explore complex relationships, psychological nuance, and unconventional narratives, but "TonyInterruptor" does not appear to be one of them—at least not as of my most recent update (August 2025).

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 Three Possibilities:

1. New or unpublished work:
   If "TonyInterruptor" is a recent release, unpublished manuscript, or under a different title, it may not be in public databases yet. You could check Nicola Barker’s official website or publisher for confirmation.

2. Fictional or creative project:
   If you're working on a creative piece involving these characters or referencing a speculative scenario, I’d be glad to help you explore why Fi and Sasha might fall in love based on invented context.

3. Typo or confusion:
   It's possible the name or title is misspelled or misremembered. Let me know if you meant a different book or author, and I’ll help you dig into it.