Story: 4 stars 
 Illustrations: 4 stars 
 Hopper, Eni, and Josh continue their escapades and we meet the villain, Dr. One-Zero, up close. We also learn more about Hopper's dad, who is still missing, but he is not the only former student of The Bee School who has strangely disappeared. As in the previous books of this series, another facet of the mystery is introduced but not yet solved. 
 Introduces basic logic constructs of computer programming and some coding is worked into the story. The language appears to be based on machine code, which is simple enough for beginners. In addition to the binary math, commands, loops, and variables introduced in the previous books, parameters and if/else logic are explained in this volume. 
 This graphic novel collects issues/chapters 7 through 9 of Secret Coders. Ends on a serious cliffhanger. Art is good though the characters have strange eyes. The color scheme is white, black, and an aqua that gives the book an old-fashioned feel, though I believe it is set in present day. Probably best suited for middle schoolers, but some high school students may enjoy it as well, especially those who like math and computers.