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This was fine as a one-day skim. It's short and has a few specific things you can do to calm the voice in your head, backed up by reasonable evidence by psychology standards: think about situations as a fly on the wall, such as by speaking to yourself in the third person; use rituals to distract yourself; and find placebos, which work even if you know they're placebos. But it's not worth a deep read -- I didn't learn much about why this happens or why these interventions work, and the whole thing felt shallow. On the plus side, it's the first book I've read that was published within the last year that didn't have an intro all about Covid, which is refreshing.