The Planet of Puzzles: Volume 4 by David Glover
Space Station Alpha has been captured by aliens, and only you can rescue it. If you fail, the aliens will take over the Planet! It's a mathematical mystery of data handling, but will you survive until the end? Use your problem-solving skills and mathematical knowledge to decide how the plot unfolds and to help save the day! Finding the answers will enable you to advance through this exciting adventure story, following the clues which are dotted along the way, and learning more about maths with every step you take.