Mensa Secret Codes for Kids (Mensa Children's Titles)

by RobertAllen (Author)

• Used

  Paperback
  1997

  $3.80

  Over 100 secret messages to solve and crazy codes to crack. Each story involves some sort of code, such as a mystery letter or secret message, which you need to crack to find the hidden meaning.

• Used

  Paperback
  1999

  $3.28