Renowned for his contribution to the famous Arc de Triomphe, the French mining engineer, Louis-Étienne Héricart de Thury, kept a guestbook. It was stationed not at the entry or on a lobby stand. Instead, it was at the exit of one of Paris' longest established catacombs, The Ossuary, which Héricart de Thury finished renovating in the early 1800s. Unfortunately, the Ossuary's guests listed were usually persons not leaving the underground cemetery. Yes, for funeral repasts, and gladly the Indigo Olive Checkerboard Guest also has happier purposes for any celebrating life. A guestbook is a book form way for visitors to confirm their visits for their hosts at a residence, event, family reunion, or another social arrangement. It is a form of etiquette recognition of those living and to be remembering. Hosts can use guestbooks to enclose their memories and express gratitude to their visitors. The Indigo Olive Checkerboard Guestbook is publishing without its name scribbled on the front cover and title page. It allows hosts to personalize their guestbooks accordingly. The interior pages have no pointers or indications for names, dates, and addresses, again an open-door option for hosts. Forty pages contain 15 horizontal, shaded listings, each totaling 600 entries. It may be enough for three separate significant events. If you place the book on a music or speaker's stand at a 10-15 degree angle, it opens in a landscape format from the bottom edge of the book cover. The listings are displayed left to right.