This is an older version that is medically out of date and is currently out of print by the publisher. the authors (Pediatrician Robert Bucknam, M.D. and Gary Ezzo) & publisher recommend pursuing the current edition with isbn 1932740139 which has a pink banner ribbon on the front of the cover. The current and most recent version is the 5th edition, February 2012. We highly recommend ONLY purchasing the newest and most current version of On Becoming Babywise (isbn 1932740139). It has a new chapter, several important revisions, the latest in medical updates, and is 19% longer than the former version. In becoming one of America's leading infant management guides, On Becoming Babywise has continued to improve its methods and practices throughout its 30 years and this latest version is the result of all the best over the last three decades. The Babywise method continues to gain global recognition for its common-sense approach to parenting a newborn. It is an infant management plan offered by Pediatrician Robert Bucknam, M.D. and co-author Gary Ezzo which helps parents successfully and naturally synchronize their baby's feeding time, waketime and nighttime cycles.