Mixed feelings about this book. As someone with ME/CFS, this would have been very helpful to read when I was diagnosed. I think it would be really helpful for anyone feeling exhausted or with an energy-limiting condition.
However, in the 6 years since I've had the condition, through trial and error, hard work, and a good specialist, I've figured out pretty much everything in here myself. So for me personally it didn't add much that was new, although there were a few reminders that were good.
I also found it annoying in places - to be fair she doesn't say she is "cured" and still says she has relapses and has to monitor what she does. But I'm not sure someone with very severe ME who can't get out of bed will be able to do much with it. I think this is really aimed at people with mild/moderate ME or just burnout/exhaustion.
I found it quite irritating though when she said she prepared for her wedding by reducing activity beforehand and building up physical stuff instead, because most people, if they're managing to keep working with ME, won't be able to just work 2 hours a day for several months to prepare for a big event. It's just not realistic for the average person's situation, and that's if you can manage to work at all. If you're in bed several hours a day there's not much you can reduce.
There's a lot of great stuff in here and I did appreciate the way she explains the difference between emotional, mental, and physical energy and how to manage each of them differently.
However - if she is back to functioning as well as she says, she's really lucky, because most people with ME/CFS aren't able to recover to the extent she seems to have done, so don't read this hoping for a "cure". It might work loads better if you are burned out/stressed kind of exhausted.
I'd recommend it if you know nothing about pacing or ME management, or you are exhausted for some other reason, but for me personally it wasn't anything new or amazing.