"The Constant Nymph" is the compelling story of an unusual love triangle involving the teenage Teresa. She and her brothers and sisters live a bohemian life in the Austrian Tyrol, but her father's death catalyses a sequence of events that is rather like watching a car crash in slow motion. You can do nothing to stop it, you know that it cannot end happily but you are drawn in and can't look away.
The story is very readable still after over eighty years, thanks to the memorability of the characters. Although not necessarily out-and-out likeable, one can empathise with them and feel their joy and pain. For example, marriage brings out the worst in Florence, turning her from an intelligent, free-thinking young woman into what we would call a control-freak these days.
In addition to the compelling story and characters, "The Constant Nymph" is cleverly written and cattily funny in places despite the ultimately tragic outcome. If you have read any of Nancy Mitford's books or Dodie Smith's "I Capture the Castle", this should also appeal.
I would really rate this book as 4-and-a-half stars or 9/10. The missing half is due to the feeling that I didn't really get as much into Teresa's perspective as much as I would have liked - of all the characters, she remained a little enigmatic.