Thousands of articles and books have been written about La Celestina and scholars still do not know who was the mysterious Aragonese author of this book. The literature continues saying that Fernando de Rojas is the author of a large part of La Celestina. The scholars have spent many years in research and obtained excellent dissertations and articles. However, La Celestina continues to be a mystery and one cannot escape the impression that scholars continue working in a vicious circle. Fortunately we have great researchers such as Jordi Bilbeny who stated that el Lazarillo was written by Juan de Timoneda and that the author of La Celestina came from Valencia. On the other hand Manuel Civera argues that the story recounted in La Celestina took place in Sagunto. This book documents my research of the last four years of this personage's life and gives sufficient information to initiate the identification of the unknown mysterious Aragonese author of La Celestina.