Brock may be dressed like a superhero, but he sure doesn't feel like one, as social anxieties threaten to rain on his fun    .Juan's superhero-themed birthday party is about to start, but Brock is feeling trepidatious about attending without his brother as his trusty sidekick. His costume does not fit quite right, and he is already running late, and soon Brock is "way past worried." When he arrives at the party he takes some deep breaths but is still afraid to jump in and so hides behind a tree. Hiding in the same tree is the similarly nervous Nelly, who's new to the neighborhood. Through the simple act of sharing their anxieties, the children find themselves ready to face their fears. This true-to-life depiction of social anxiety is simply but effectively rendered. While both Nelly and Brock try taking deep breathes to calm their anxieties without success, it is the act of sharing their worries in a safe space with someone who understands that ultimately brings relief. With similar themes, Brock's tale would make a lovely companion for Tom Percival's Ruby Finds a Worry (2019) on social-emotional–development bookshelves. Brock is depicted with black hair and tan skin, Nelly presents White, and peers at the party appear fairly diverse.Though books on childhood anxiety are numerous, it is worth making space on the shelf for this one. (Picture book. 4-6)