Well I don't own it yet but it is willed to me from my Father. It is a first edition of De Re Metallica. 1556 printed in Latin.It is essenitaly the first book printed on Mining, Metalurgy and Assaying.My Father already owned a signed 1912 Hoover translation and he wanted an orignal. So around 1988 I scouted book stores until I found a copy in Canada. It's really cool to own something over 400 years old. The plates are amazing and it made me learn enough Latin to be able to read it.
As for my SFF collection I have a second American edition of Jules Vernes' A Journey to the Center of the Earth. 1874 special deluxe edition. Picture below
