The author was born in Puerto Rico and later moved with her mother and two siblings to Long Island, New York, as a young child. The author remained on Long Island where she later raised her son. The author earned a bachelor's degree and a master's degree in social welfare from Adelphi University, located in Garden City, New York. As a Licensed Clinical Social Worker, the majority of the author's career focused on working with children and adolescents with psychiatric and behavioral disorders.

The author began utilizing children's books as a therapeutic tool in a school-based mental health treatment program to help children express their feelings and manage their behaviors. During her time working in this school-based mental health program, the author obtained her certification as a New York State School Social Worker.

The author was inspired to write Sally and the Magical Tree after her husband Alain described a magical moment he experienced as he walked past a tree. It became clear to the author that her story and resiliency can be a source of encouragement to help children cope with situations that may make them feel unsafe.

The story is based on the author's life experiences living in foster care as a young child surrounded by domestic violence and abuse. A fifth grade teacher who came into her life gave her hope of a better future. Ms. Rivera hopes this book will give strength, inspiration, and empowerment to other children who experienced violence, and helps them know there can be a bright and successful future filled with love and joy.

Carmen was diagnosed with Multiple Sclerosis in 2007, and in 2019 retired due to her disability. This book was written after her retirement and is a testament to her ongoing commitment to help children believe in a better tomorrow. To know Mr. Tree can be a teacher, police officer, a friend or a trusted person in the community. The author plans to write additional therapeutic books to discuss situations, coping strategies, and stories of strength and hope to help inspire children to believe in their inner strength and a brighter tomorrow.