Case of the Uncrackable Code-Paperback

Even though Rocket is the fastest kid in third grade, his dyslexia makes him a slow reader. When he finds coded notes, Rocket knows he needs the help of his friends, the Gumshoe Gang. Together they try to crack the secret messages but kind they are stuck. Can the Gumshoe gang crack this case? Is Mrs. Flores in danger? And is the new computer teacher really an alien?