The Night Sky Observer's Guide consists of 2 books, as shown above. They are based with thousands of observations ans describes in details the differents objects that can be seen within a constellation. For each constellations, the showcase object are listed like multiple and vairable stars. All the objects are described depending the instrument diameter, easy then for the amateur to prepare the observation.
These book make a huge documentation, very usefuf to prepare seriously a star party.
Ces deux ouvrages constituent un vrai puit d'observation et surtout une excellente documentation.
 

Here are some views detailling the info on Auriga :