Street & Smith, a dime novel and boys' weekly publisher, was next on the market. Seeing Argosy's success, they launched The Popular Magazine in 1903, which they billed as the "biggest magazine in the world" by virtue of its being two pages (the interior sides of the front and back cover) longer than Argosy. Due to differences in page layout however, the magazine had substantially less text than Argosy. The Popular Magazine did introduce color covers to pulp publishing, and the magazine began to take off when in 1905 the publishers acquired the rights to serialize Ayesha, by H. Rider Haggard, a sequel to his popular novel She. Haggard's Lost World genre influenced several key pulp writers, including Edgar Rice Burroughs, Robert E. Howard, Talbot Mundy and Abraham Merritt. In 1907, the cover price rose to 15 cents and 30 pages were added to each issue; along with establishing a stable of authors for each magazine, this change proved successful and circulation began to approach that of Argosy. Street and Smith's next innovation was the introduction of specialized genre pulps, with each magazine focusing on a particular genre, such as detective stories, romance, etc.