NEW YORK (REUTERS).- A collection of more than 100 previously unpublished photos of Marilyn Monroe can be seen for the first time in a new book “Marilyn: August 1953.” The book, published this week by Calla Editions, features digitally restored black and white images taken during the summer of 1953 of a then 27-year-old Monroe. The photos were shot by John Vachon, on assignment for LOOK magazine in Alberta, Canada, where Monroe was filming “River of No Return” with Robert Mitchum. An injured ankle prevented Monroe from filming, allowing Vachon to have several days to shoot the Hollywood icon. Only three of photos from the sessions were published in an October 1953 LOOK story. The book will feature photos of Monroe and then fiance, baseball legend Joe DiMaggio snuggling. Vachon is thought to be the only photographer the pair formally posed for. In another of the pictures, a comically frightened-looking Monroe is in the