This book had been recommended to me several times but, to my shame, I'd scorned it as a "beginner's book". That'll teach me! Two years after completing my poetry collection, I'm still unable to return to the page.
This does have basic exercises, but primarily it's concerned with mindset.
The gallows humour was a welcome surprise, except for the times she went too far and made me wince.
Glad I read it: as for how efficacious it turns out to be...