Sohrab and Bruno have lived their entire lives aboard the spaceship Barnard Star. When the captain of the ship announces someone has been stealing people's water rations, Sohrab and Bruno are determined to solve the case. Students will enjoy this illustrated fiction reader that features compelling text, grade-appropriate vocabulary, and chapter format to build reading comprehension, vocabulary, and fluency. This hi-lo reader is perfect for students who need high-interest, low-readability books.