What is "debrett's"

Debrett's is a specialist publisher, founded in 1769 with the publication of the first edition of The New Peerage. The name "Debrett's" honours John Debrett. Debrett's is published under the name Debrett’s Peerage & Baronetage, a book which includes a short history of the family of each titleholder. The editor of Debrett's Peerage and Baronetage is Charles Kidd.