Yes, book editor(s) / author(s) and all chapter authors and contributors get free access to the Book, i.e. to the electronic / PDF edition.
Besides royalties, Book editor(s)/author(s) are entitled to a free electronic copy of their Book and significant discounts on the print edition. (Please note the print edition is available as print-on-demand only and the publisher does not maintain any stock of the print edition).
The Book’s editor(s) and author(s) will receive royalties on the sales of the Book. No royalty is paid to chapter authors. Please contact ebooksales@benthamscience.net for further details.