s Marshmallow the dog as he finds out that there will be a new addition to the family. Marshmallow has uncertainty about what his life will look like once the new baby arrives and fear sets in. As we discover Marshmallow's fears, we see him comforted by the ones he loves and trusts (his humans Ellie and Noah). They help him gain courage ahead of the new arrival, and assure him he will be loved just as much as he was before. In the end, Marshmallow loves this new addition to their family and learns that the love his humans have for him doesn't lessen, but instead grows bigger as they welcome home his new best friend.

This book explores the ideas of trust, new experience, bravery, family, friend bonding, and emotional intelligence for children ages 4-7 with illustrations and three writing prompts for readers to relate their own experiences to Marshmallow.