This manual is organized as a series of chapters, with each chapter in a separate file. If you feel capable of contributing to a specific section, send out a message to the Emacspeak mailing list mailto:emacspeak@emacspeak.net, stating your intention to work on a section. You can then start adding content to a local copy of the chapter to which you are contributing. When you feel you have something to submit, send out a Github Pull Request.