Nothing makes an author grit his teeth more than having his factual mistakes pointed out.
Yesterday, in an otherwise favorable newspaper review of my Hang Fire, two bloopers came to light: The Battle of the Little Bighorn went down in 1876, not 1873, and Porcupine County is in the Eastern time zone, not the Central.
I knew that. And had gotten both right in previous novels.
I'll correct them in the upcoming e-book, if there is one.