The Bobbsey Twins and Baby May by Laura Lee Hope is a children's novel. The book tells the story of the Bobbsey family, as they adjust to the arrival of a new baby sister, Baby May. The Bobbsey Twins, Bert and Nan, are excited to have a new baby sister, but they soon realize that taking care of a baby is harder than they thought. The family works together to care for Baby May, taking turns feeding, changing, and playing with her. Throughout the book, the Bobbsey Twins learn important lessons about responsibility and caring for others. They also have fun adventures, such as going on a picnic and playing in the snow. As the story unfolds, the Bobbsey family faces some challenges, such as when Baby May gets sick and has to go to the hospital. However, they work together to support each other and take care of Baby May. In the end, the family celebrates Baby May's first birthday, and the Bobbsey Twins reflect on how much they have learned about caring for their new sister. The book is a heartwarming story that teaches important lessons about family, responsibility, and love.