Not least because we are living in a golden age of annotated editions.
An "annotated" edition has been published to facilitate critical reading of the text.
The book was published in 1950, with a complete annotated edition following in 1966.
This would also apply to a new annotated edition.
That's why there's a niche market for annotated editions and period guides.
He has published a revised and annotated edition of Geronimo's 1906 autobiography.
At nineteen he published an annotated edition of the Brazilian constitution that went through ten editions!
There are other versions, including the original 1649 version, but Savage's annotated edition, or its 1853 revision, is considered to be the most comprehensive.
This new annotated one-volume edition includes many illustrations of architectural drawings and art works.
In 1584 he published an annotated edition of Ramus's Dialectics.