Regarding: The Pedophile's Guide to Love and Pleasure
AMAZON, most of us believe in free speech. But there are also legal limits on this. In many jurisdictions, inciting criminal acts is conspiracy and both you and the author may be liable to criminal prosecution by continuing to publish this material. I urge you to remove it from sale while you seek competent legal advice in all jurisdictions in which you do business.
Amazon is a corporate entity. That is: a self-obsessed sociopath which works to maximise profit at the expense of its stake-holders. This is not a judgement about Amazon, but a statement of fact about what corporations are, as enshrined in company law. Appealing to its morals, or better nature, is futile - a corporation doesn't have them. We must present a sound business case for changing its mind.
Presumably Amazon currently judges that freedom to publish at will is more profitable that caving in to public outrage. When the point is reached where outraging its stakeholders will damage its business interests more than self-censorship, then logically it will change its policy.
Part of this involves explaining to stakeholders, which in this case includes most of the online planet, precisely what this book says. Another part is looking for legal threats to this continued publication which can convince Amazon that it is in its interests to reconsider.