The Make Believe Stories series, begun in 1918 under the pseudonym of Laura Lee Hope (best known for the Bobbsey Twins series), consisted of 12 books. The final book was published in 1923, while the series continued to be printed in different versions for years to come. It is highly likely that Lilian Garis and her husband Howard R. Garis were responsible for the writing of these books for the Stratemeyer Syndicate, although other syndicate authors may have been involved. Source: Wikipedia (en)