[ownedbycats]

I came across a somewhat amusing false-positive:

I was processing metadata for Halo: Contact Harvest by Joseph Staten. There's an ISBN (9781982111700) listed on the Kobo store page but that's not anywhere in the book itself see the edit.

However, Extract ISBN did detect one of these (from 10% and 29% in):

“48789-20114-AJ,” Avery mumbled.

“48789-20114-AJ,” she said, pulling a COM-pad from the purse, and reading from its screen. “That is your serial number, correct?”

Log:

Spoiler:

Starting job: Extract ISBN for 1 books 
=================================================== 
Title:  Halo: Contact Harvest 
Format: EPUB 
Path:   D:\Documents\My Books\Joseph Staten\Halo_ Contact Harvest (8304)\Halo_ Contact Harvest - Joseph Staten.epub 
--------------------------------------------------- 
  Scanning first 10, then last 5, then remaining 24 files 
      Invalid ISBN match: -000987111 
      Invalid ISBN match: -000614236 
      Invalid ISBN match: -16523.14.82 
      Valid ISBN10: 4878920114 
  Scan time: 1.81 secs 
  The isbn was found in 1.81 secs 
  New ISBN extracted of: 4878920114 
=================================================== 
Scan complete, with 0 failures

This coincidentally ends up being a valid ISBN-10 for what seems to be some kind of comic/manga which is definitely not related to my sci-fi action-game expanded universe novel.

I'm not sure if there's anything that can be done about this (or whether anything should be done). I'm willing to send a copy of the book if you'd like to test further though.

EDIT: To make things even weirder, I just found the real ISBN was in the book, the last line of the book. It wasn't detected though.