The Date Hiding Inside Every Ebook You've Sold

Niche of One Creator Business Bundle — Eighteen guides, workbooks and spreadsheets for thirty-five bucks, and the GPT prompt kit’s one of the eighteen, not bolted on as some bonus nineteenth thing. The whole stack still runs you less than half what those eighteen would cost bought one by one. Income tracker, tool-cost kill sheet, the pacing books so you don’t burn out, the selling guides, the works. Built for whoever’s running this solo and watching every dollar before it leaves the account.

otophon Is a Plug-In to Play Tones Inside Your Head — A rabbit hole for anyone who works in sound: a new plug-in that doesn’t make a sound so much as talk your own cochlea into making one. Feed it two tones at the right offset, turn real speakers up loud, and your inner ear generates a third tone that was never in the file, the same trick Maryanne Amacher built whole compositions around back in 1999. Reading how it works messed with my head a little, in a good way.

THE TIP. Every EPUB you’ve ever bought or built is just a zip file wearing a costume. Rename one to .zip, unzip it, and there’s a folder called META-INF and a file called content.opf sitting right there: title, author, publisher, language, and a modified date that most export tools stamp with whatever moment you hit the button. Open content.opf in a plain text editor and you’re reading the book’s paperwork instead of its cover.

If you sell your own, this is the part that bites. That date doesn’t move when you fix one typo in Word or Vellum unless you re-export the whole file, so a “2026 edition” can ship carrying 2024 in its own guts and nothing on the outside will ever say so. Calibre shows you the field without any unzipping: ebook-meta yourbook.epub. Takes about five minutes, no excuse not to.

Anyway. Worth checking before you relist anything as “updated,” because a reader can’t see the mismatch but a sharp-eyed reviewer sometimes will, and a wrong date reads as sloppy the second somebody notices. Costs nothing but five minutes. Do it anyway. Go look at your own file. Bet at least one date in there surprises you.

Rename an ebook to .zip tonight and tell me what date you find. ~ J.D.