If you have interest in DynamoDB and want to know what DynamoDB is all about and become proficient in using it, this is the book for you. If you are an intermediate user who wishes to enhance your knowledge of DynamoDB, this book is aimed at you. Basic familiarity with programming, NoSQL, and cloud computing concepts would be helpful.
Reviews with the most likes.
If you want a single source to get you up to speed on DynamoDB this is not a bad choice.
It provides a run down of the DynamoDB api, advice and examples of common use cases and
also provides background on how DynamoDB works behind the scenes.
That being said, I would not pay money for this book (I had access via a subscription service). By 2016 this is already starting to feel a bit out of date as it has not been updated to reflect the changes made to DynamoDB in the past couple of years.
Also everything in this book is available elsewhere, a lot of it was just collated from the documentation provided by Amazon. The behind the scenes was just a summary of the Dynamo paper, and at least one sentence has clearly been ripped from Wikipedia.