What To Expect The First Year is an essential guide for first-time parents presented in an illustrated, easy-to-understand format. The second edition, written by Heidi Murkoff and Sharon Mazel, is jam-packed with practical advice, feeding schedules and developmental milestones, along with information on common infant health issues. The book is published by HarperCollins and has 798 pages. It is a must-have for any new parent looking to navigate the ups and downs of their baby's first year.