The essential sequel to What to Expect the First Year, with 11 million copies in print, What to Expect the Second Year picks up the action at baby’s first birthday, and takes parents through what can only be called “the wonder year”—12 jam-packed (and jam-smeared) months of memorable milestones (from first steps to first words, first scribbles to first friends), lightning-speed learning, endless explorations driven by insatiable curiosity. Not to mention a year of challenges, both for toddlers and the parents who love them, but don’t always love their behaviors (picky eating, negativity, separation anxiety, bedtime battles, biting, and tantrums).

Comprehensive, reassuring, empathetic, realistic, and practical, What to Expect the Second Year is filled with solutions, strategies, and plenty of parental pep talks. It helps parents decode the fascinating, complicated, sometimes maddening, always adorable little person last year’s baby has become.

From the first birthday to the second, this must-have book covers everything parents need to know in an easy-to-access, topic-by-topic format, with chapters on growth, feeding, sleeping, behaviors of every conceivable kind, discipline (including teaching right from wrong), and keeping a toddler healthy and safe as he or she takes on the world. There’s a developmental time line of the second year plus special “milestone” boxes throughout that help parents keep track of their toddler’s development. Thinking of traveling with tot in tow? There’s a chapter for that, too.