At the time all manuscript glitches happen to be corrected and all accredited revisions carried out, the manuscript is then typeset and readied for printing. Even so, there have been some which have paid out upwards of £600 since their book provided maps, graphics following to each chapter title etcetera https://maplepublishers.com/blog/5-considerations-when-hiring-a-book-illustration-agency-or-a-professional/