Harpercollins Speakers B...11月 2025のための市場シェア分析

the harpercollins speakers bureau is the first in-house publishing lecture agency and continues to be the leading speakers bureau for authors. we represent a stellar list of writers from around the world, making us uniquely positioned to give meeting planners direct access to an array of fascinating keynote speakers, including leadership speakers, business speakers, celebrity chefs, investigative reporters, famous actors, bestselling novelists, and more.