"Here, the awesome spectacle of black holes is used to introduce young astronomers to the fundamentals of astrophysics. Without getting bogged down in technicalities, Kurtz explains concepts such as the electromagnetic spectrum and gravitational waves, illustrating how scientists use existing knowledge, aided by technology, to deduce information about distant black holes. Four brief chapters cover their births, their colossal interactions, and landmark observations. Pages typically contain one paragraph paired with a large photo, set within a dark layout that places readers directly among the stars. Four specific images allow smartphone-wielding students to get a three-dimensional look at celestial interactions through beautiful augmented-reality illustrations. While a foundation in science will help kids fully engage with this material, the focus of the Space in Action series (8 titles) is on building interest, and in that, it's successful."--Booklist.