J. Alvar Ezguerra is not the author of this book. The correct author is Carlos G. Wagner (one can check WorldCat for this particular ISBN). On the other side J. Alvar Ezguerra looks like a mistyping of "Jaime Alvar Ezquerra" who is the author of several books in this collection (Akal Historia del Mundo Antiguo).
On the other side J. Alvar Ezguerra looks like a mistyping of "Jaime Alvar Ezquerra" who is the author of several books in this collection (Akal Historia del Mundo Antiguo).
Can you please correct the author?