RNA - Charbonnier, also known as Charb, was killed during an attack at the Charlie Hebdo office in Paris on January 7. The two attackers - Cherif and Said Kouachi - killed at least 12 people.
According to publishers, the book entitled 'An Open Letter to the Fraudsters of Islamophobia who Play into Racists' Hands', which upholds the right to ridicule religion, was finished two days before Charb was killed, BBC reported.
It is both a defence of Charlie Hebdo's editorial stance and an attack on the paper's detractors.
"The suggestion that you can laugh at everything, except certain aspects of Islam, because Muslims are much more prickly than the rest of the population - what is that, if not discrimination?" Charb wrote.
He condemns this position as "white, left-wing bourgeois intellectual paternalism".
He argues that the fight against racism is being replaced by a misguided struggle against "Islamophobia".
For the French, the Charlie Hebdo attacks came as a massive shock. And in the weeks that followed, the French government presented ambitious plans to prevent further terrorist attacks. The attackers in the Charlie Hebdo shootings were French nationals and were found to have connections with the ISIL terrorist group.
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