A hilarious and eye-opening tour of unforgettable typos, misspellings, and more with pictures culled from the Facebook group by the same name.

Correct grammar and proper spelling can be a challenge, and their absence can be a source of gleeful humor to everyone but the victim of a bad grammar attack. How do you react to sandwich boards, road signs, laminated instructions, and other written missives that are just not exactly what their creator meant? If you’ve ever (gently) judged anyone else for their linguistic failures, if you find yourself guffawing about the frequent confusion between “incontinence” and “inconvenience,” if you’ve ever been tempted to whip out your marker to add in or cross out apostrophes, and if you’ve refused to answer e-mails in which “your” and “you’re” are used interchangeably, this book is for you.