I don't know if The Forgotten Slave Trade: The White European Slaves of Islam is reliable but I have got more and more interested in the subject while reading Don Quixote and reflecting on Cervantes' time in Algiers.
I wait patiently, with no urgency. I have been granted all the time there is. I do not try to make anything of what I see. I hold no expectation or assumption that I know anything at all.