New York: Harmony Books, 1980. First Edition. Fine/Near Fine. First American edition, first printing. Signed by Douglas Adams on the half-title page, directly below a red rubber stamp that reads "Always know where your towel is..." Bound in publisher's black paper-covered boards over turquoise cloth spine, with titles stamped in metallic pink. Fine, in a Near Fine unclipped dust jacket with light shelf wear. To quote The Hitchhiker's Guide to the Galaxy, a towel, of course, "is about the most massively useful thing an interstellar hitchhiker can have," as Adams maintains a hitchhiker who knows where their towel is likely has come prepared with an assortment of other items, such as a toothbrush, and therefore is in control of their situation. Fans of Adams celebrate Towel Day every May 25th, paying tribute to the author by carrying around a towel. A stunning copy of the sequel to Hitchhiker's Guide. Scarcely found signed.