▁For ▁approximately ▁a ▁de cade , ▁an ▁active ▁supporting ▁group ▁was ▁the ▁Pra ed ▁Street ▁Ir regular s , ▁pattern ed ▁after ▁the ▁Baker ▁Street ▁Ir regular s . ▁ ▁In ▁ 1 9 4 6 , ▁Con an ▁Do yle ' s ▁two ▁sons ▁made ▁some ▁attempts ▁to ▁force ▁Der le th ▁to ▁ce ase ▁publishing ▁the ▁Sol ar ▁P ons ▁series , ▁but ▁the ▁efforts ▁were ▁un success ful ▁and ▁eventually ▁with dra wn . ▁ ▁Der le th ' s ▁mystery ▁and ▁detect ive ▁fiction ▁also ▁included ▁a ▁series ▁of ▁works ▁set ▁in ▁Sac ▁Pra irie ▁and ▁featuring ▁Judge ▁Pe ck ▁as ▁the ▁central ▁character . ▁ ▁Youth ▁and ▁children ' s ▁fiction ▁Der le th ▁wrote ▁many ▁and ▁varied ▁children ' s ▁works , ▁including ▁bi ograph ies ▁meant ▁to ▁introduce ▁younger ▁readers ▁to ▁expl orer ▁Fr . ▁Mar qu ette , ▁as ▁well ▁as ▁Ralph ▁Wal do ▁Em erson ▁and ▁Henry ▁David ▁Th ore au . ▁ ▁Ar gu ably ▁most ▁important ▁among ▁his ▁works ▁for ▁younger ▁readers , ▁however , ▁is ▁the ▁Steve ▁and ▁Sim ▁Myst ery ▁Series , ▁also ▁known ▁as ▁the ▁Mill ▁Creek ▁Ir regular s ▁series . ▁ ▁The ▁ten - volume ▁series , ▁published ▁between ▁ 1 9 5 8 ▁and ▁ 1 9 7 0 , ▁is ▁set ▁in ▁Sac ▁Pra irie ▁of ▁the ▁ 1 9 2 0 s ▁and ▁can ▁thus ▁be ▁considered ▁in ▁its ▁own ▁right ▁a ▁part ▁of ▁the ▁Sac ▁Pra irie ▁S aga , ▁as ▁well ▁as