Not the author, but do work with Chris at incident.io.
We continue to see smaller companies struggle with incident response, often picking processes designed for much larger organisations.
This guide is the "just do it this way" manual for smaller companies, helping them find something that works right out the gate.
Most of it is common sense, while some bits–such as the advice on post-mortems–might be considered unconventional. Will be interested in what people think!