Robots Go Wild!

In the second book of the House of Robots series, fifth grader Sammy Hayes-Rodriguez and his robot "brother" E face a new challenge when E malfunctions just as a cooler, newer robot arrives at school to compete for attention. While E serves as a proxy for Sammy's bedridden sister Maddie at school, the malfunction threatens Maddie's ability to keep up with her schoolwork. Sammy must diagnose what's wrong with E and fix the problem to save his family, with his mother's job potentially on the line. The book is co-authored by James Patterson and Chris Grabenstein.