Original: Reception In several German states , articles from the books have been used officially as teaching materials , and -- according to Sick 's foreword of August 2005 -- the series has been added to the set text list for the Abitur in Saarland .
Simplified: In several states of Germany , writings from the books have been officially recognized as teaching documents after Sick 's foreword was used in Saarland in August 2005 .