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This is for the US Amazon and Audible stores.
This book was recommended to me, but I couldn't bring myself to paying the $26+ for a paperback.
The eBook is $4.99 on iBooks and higher elsewhere.
The Audiobook is normally $24.95 according to Audible (US), yet you can add it for an additional $1.99 through the Amazon eBook purchase
The book rates 4.32 on Goodreads, 4.8 on Amazon, and 4.4 on Audible.