Robert's Rules of Order Newly Revised
11th edition, (2011)
The current edition has a direct tie to the original 1876 pocket manual by U.S. Army General Henry Martyn Robert.
The publisher is Da Capo Press, an imprint of the Perseus Books Group.
Note that the last name of the original author was "Robert". And the title is spelled with the possessive apostrophe, thus: "Robert's Rules" not "Roberts Rules".
ADVICE -- When shopping for the book:
Some publishers are making money selling obsolete editions, and they are publishing the 1st, 2nd, 3rd, or 4th editions (1876 through 1915), which are in the public domain. These publishers depend on the shopper not knowing the difference between the 100 year old editions and the current (11th, publ. in 2011) edition.
When the original author, Gen. Robert, died in 1923, his children, and in the later generation, his grandchildren, maintained the updates to the text, and they have supervised the editing of the subsequent editions, printing a new edition on average every ten years or so. So there is a family tie between the current edition and the original edition.
Robert's Rules of Order In Brief
official condensed digest
The authorship team of Robert's Rules of Order Newly Revised created a condensed version of the 700+ page full edition.
I recommend that reader start this this abridged version, if the reader has no experience in parliamentary procedure, because this digest only includes the most commonly-used rules and practices, so every page has value.
Once the reader has conquered this little book, then the reader may dig deeper in detail and fill in the gaps by reading the 700+ page manual.