Q: Can you tell me anything about this little book? (Paul and Virginia)
A: Your book was published in 1901-1902 as part of the Petit Trianon Series. It original came in a labeled box.
See http://henryaltemus.com/series/series143.htm
The picture on the right of the cover was done by Alphonse Mucha, a well known Czech artist. It is called Poetry. See http://henryaltemus.com/artists/artists-Mucha.htm