This book is a nice copy of Members of the Family, a 1911 reprint of the follow up book The Virginian (it actually says, "More Stories of 'The Virginian'"
The book shows wear, as you would expect from a book printed nearly 100 years ago.
Wester's writings of The Virginian have been adapted numerous times, with the most recent being the 1946 version starring Joel McCrea. It was also adapated into the hit TV series of the same name in 1962 until being cancelled in 1971. The series starred James Drury.