I can see why <i>Blockchain Books</i> may include one or two Amazon links (though not <i>everything</i> being a link to Amazon), but why is literally every so-called "resource" under <i>Bitcoin</i> and <i>Ethereum and Smart Contracts</i> also simply a link to Amazon?<p>A quick Google brings up results like:<p><a href="https://souptacular.gitbooks.io/ethereum-tutorials-and-tips-by-hudson/content/giant_ethereum_resource_list.html" rel="nofollow">https://souptacular.gitbooks.io/ethereum-tutorials-and-tips-...</a><p>What makes your list of Amazon links better than everything on that page? Have you even read and/or reviewed all of the books you're linking to? If not, why are you recommending them to other people?<p>Why is your list of Amazon links under "Bitcoin" better than something like this (found in a half second Google):<p><a href="https://github.com/solocshaw/Bitcoin-Resource-List" rel="nofollow">https://github.com/solocshaw/Bitcoin-Resource-List</a><p>Which somehow manages to contain zero Amazon links, even under <i>Books</i>, which links to the <i>free</i> Github hosted version of Andreas Antonopoulos' <i>Mastering Bitcoin: Unlocking Digital Cryptocurrencies</i>, unlike your list which, like most of the other "resources" you list, simply links to Amazon.