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This particular book should be included if Spark will eventually get a nice and shiny box version with caps and T-shirts inside. What more can I say? This book is partly written by the creator of Spark himself, hence it should be treated as a comprehensive and succinct manual which unfortunately it doesn’t have as of today (for free).
Luckily, if you’ve spent a relatively small amount of money to buy/read/learn/try all examples you will know two times more than a typical Spark developer with 1 year of experience under his belt.
The only problem I had with this book is that some of the examples don’t work because the book itself hasn’t been updated to be on track with the most recent version of Spark (which differs a lot from the version described in the book).
Score 4/5
