Talk to Me by Sonia Ellis is a book about a young teen girl, Sadina, trying desperately to help her 7-year-old sister speak. Maddie speaks just fine at home to her mom, dad and older sister, but as soon as anyone else is around, she is absolutely silent. Maddie has selective mutism and it isn't something she can simply overcome. Sidina worries for her sister and is determined to find a way to help her.
This book was short and moved quickly. It would likely be a good read for a pre-teen. Honestly, I didn't really enjoy it that much. I was briefly engaged, but the storyline took an unlikely turn that seemed forced. There is an element of STEM in this book and so I appreciate that it is attempting to promote those skills, especially among girls. Perhaps you will like this book better than I did. It is the beginning of a series that could be cute.