pb?Paperback. Typically 7" by 4.25" (18 cm by 11 cm) or smaller, though trimming errors can cause them to sometimes be slightly (less than 1/4 extra inch) taller or wider/deeper.
Notes: 15th printing per number line of Signet edition of October 1957. Printed in the United States of America.
ISBN on spine 0-451-08188-? (last digit damaged, 3, 5, 6, or 9).