[bdcravens]

Yes, to potentially 2k a year in passive income: "I am hopeful that in a couple of months this might lead to a passive income of $100-$200 per month for a while."

And the author acknowledges it may come to an end: "...perhaps some of the technologies mentioned will update substantially and my book will no longer be up to date"

Also the author doesn't see the money, but only their royalty (after the initial advance is covered, which it hasn't yet)