Curufin and his son Celebrimbor.
"The seven sons of Fëanor were Maedhros the tall; Maglor the mighty singer, whose voice was heard far over land and sea; Celegorm the fair, and Caranthir the dark; Curufin the crafty, who inherited most his father's skill of hand; and the youngest Amrod and Amras, who were twin brothers, alike in mood and face."
(J.R.R. Tolkien "The Silmarillion")
I made a 3D book for the art contest of the Hungarian Tolkien Society ([link]
) and I got the first palce in the "other" categorie.
The closed book is 21,5 cm high and 15,5 cm wide.
The book: [link]
Amrod and Amras: [link]