"Alias Smith & Jones: The Story of Two Pretty Good Bad Men"
by Sandra K. Sagala and JoAnne M. Bagwell
The book contains an episode overview with detailed information about the plot and development, as well as details and background information about the series and the actors.
A free sample is available from Google Books verfügbar.
Those who can't get enough of "Alias Smith and Jones" and feel that there would have been much more to see than the producers allowed us to do, are highly recommended to have a look at fanfiction.
Especially in the English, works of varying lengths and mostly of remarkable quality are available.
A group of authors has even set itself the task of continuing the seasons "virtually". This is an annual story series which is adapted to the length of the original episodes and is based on the original writing rules of Roy Huggins.
Their particularly rich language and the additional illustrations make them an experience of a special kind.
You can find them online at: Alias Smith and Jones - Home of the Virtual Seasons
If you have problems in reading foreign languages, don't despair: there are some good translation tools online, such as DeepL