I don’t do a lot of period Italian cooking.  That will change soon!  I adore this book.  The Opera of Barolomeo Scappi (1570) Translated by T. Scully, is the compilation of recipes by Bartolomeo Scappie (the cook to the popes).

The translations are awesome.  The breadth of recipes is incredible!  From breem to turkey to peacock.  Each main ingredient is treated with respect and clear directions on how to cook and serve.  This is THE Italian period cookbook to get if you have to get just one.  This book is an A+ all the way through.