Uncorrected proof of the first edition. Softcover, 23.2 x 14.1 cm, 239 numbered pages. Light blue wrappers lettered in black...

First Italian trade edition, first or second printing with number lines from 1 to 7 and from 2006 to 2009,...

First Italian limited edition and true first, with “2005” on the copyright page, lacking the colophon page present in the...

One-page letter on Santa Fe Institute stationery, 21.6 x 14.1 cm, written on one side in black ink. Accompanied by...