Simplify the following text for a Grade 8 native English-speaking person.
Original: He conceived the idea of a periodical that would cover every topic the educated public was interested in , from commerce to poetry , and tried to convince several London printers and booksellers to take up the idea .
Simplified: He came up with the idea of a periodical that would cover every subject the educated public was interested in , from commerce to poetry . He tried to get some London printers and booksellers to take up the idea .