Check out Kevin Carson’s Anarchists Without Adjectives Study chapter on Errico Malatesta.
Errico Malatesta (14 December 1853 – 22 July 1932) was an Italian anarchist and revolutionary socialist. He spent much of his life exiled from Italy and in total spent more than ten years in prison. Malatesta wrote and edited a number of radical newspapers and was also a friend of Mikhail Bakunin. (wikipedia)
Collection of written works (The Anarchist Library)