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You could try mine: http://www.packtpub.com/apache-solr-for-indexing-data/book . It's quite popular and comes with a GitHub repo for the examples.

As an Packt author, can you opt out of those everything-free discounts?

How do you feel that a huge number of potential buyers gets your book today for free?

I was not given any options at all, for this or other promotions. No do I know if I will get paid for copies they give away for free. I suspect not.

As to getting the book for free, please do. I have something even more interesting in the works. I would love for you to read my book, get excited about Solr, get on my mailing list http://www.solr-start.com/ and pay me for my next project eventually.

The authors usually do not get rich of the books (though I did cover my tiny advance and more). The rest of the conclusions is left as an exercise for the reader.

http://www.amazon.com/s/ref=sr_st?keywords=packt+publishing&...

I got "Building Machine Learning Systems with Python".

Great book. I'm one of the suckers who paid for it months ago.

Get Clojure Data Analysis Cookbook.

It's a concise, very fast introduction to doing stuff with the Clojure Incanter library. Combined with LightTable, it's very fun.