The Invisible Twins - The Twins Discovery Series - Book 1

Dovi Abrams somehow always manages to mix into places where he doesn't belong -- like his father's private basement laboratory, for instance. When he unthinkingly fiddles with his father's experiment and it starts to go haywire, he asks his twin sister Dena -- a brilliant math-whiz -- to set it right. 
That's when the excitement really begins ....