Fate is my favourite system but for years I never ran or played horror in it, because I'd so often heard people say it just wasn't suited.
I bought this because I was curious, and a couple of weeks later I ran my favourite horror one-shot ever, in Fate Core with some modifications and tools I'd gleaned from this book.
I've now run several more and I wouldn't hesitate to run a horror game in Fate these days: with a little tweaking and thinking, the system becomes a great fit. The Fate Point Economy was maybe the one thing I feared would break horror the most, but the advice in the toolkit helps you turn Fate points into a desperate version of the "how much do you want it" central question they usually embody.
It's an excellent Fate sourcebook, but honestly it's far more than that, it's a great piece of writing about what horror in gaming really is, the different flavours of it, why it works when it works and why it doesn't when something is off.
I've been playing and running TTRPGs since 1991 and Evil Hat remains the company I hold in the highest esteem.
[5 of 5 Stars!]