No, the author is a current one, I think that the book was written about 4 years ago. The book is about this guy. There is no a particular reason, from a time to now I am reading exclusively historical novels, I like history, but I am awfull with names, dates and things like that, hence there is no too much sense from my side to read essay books or similar, so I read stories about history instead of history
Since I knew about this guy I became interested on him because of being a half brother of Iñigo Arista (considered as the first navarrese king). I was also interested on him because I listened old tales about "El moro Muza" (Musa the moor), that in some areas was considered a kind of bogeyman to scare children
On the other hand I saw the book on amazon in kindle format for a good price so I bought it.