About the authors:

Dr. M.G. Prasad was a Professor of Mechanical Engineering, at Stevens Institute of Technology for over 37 years, who specialized in acoustics, sound and vibration. One of his passions was explaining basic sound and wave ideas to children with the help of his vast collection of sound-making toys. He's given many hands-on demonstrations to school classrooms, one of which (many years ago) included his son Teju, who is a co-author on the book.

About the illustrator:

Nadia Ronquillo is a children's book illustrator, whose work can be found in books, animated short films, and publicity spots. Her website is https://www.nadiaronquilloart.com/