The Primary Magical series (24 books) was the first 2idesign designed and edited for Letts. The books have been a huge success with over 1 million copies sold worldwide. The company says: "The level of our input into making the books was unprecedented. We acted as a consultant, going into other agencies to advise on quality and standards expected by the publisher. Soon we were producing all Letts Primary list – quite amazing! Have a look in the back of a Letts Primary book for our name."