"Poldark is a series of historical novels by Winston Graham, published from 1945 to 1953 and continued from 1973 to 2002. The series comprises 12 novels: the first seven are set in the 18th century, concluding in Christmas 1799; the remaining five are concerned with the early years of the 19th century and the lives of the descendants of the previous novels' main characters. Graham wrote the first four Poldark books during the 1940s and 1950s. Following a long hiatus, he decided to resume the series and published The Black Moon in 1973.
The main character, Ross Poldark, is a British Army officer who returns to his home in Cornwall from the American Revolutionary War only to find that his fiancée Elizabeth Chynoweth believed him dead and is about to marry his cousin Francis Poldark. Ross attempts to restore his own fortunes by reopening one of the family's derelict tin mines. After several years, he marries Demelza Carne, a poor servant girl, and is gradually reconciled to the loss of Elizabeth's love." Wikipedia
You can tell how much I enjoyed the books by checking out the blog posts I wrote as I read the books the first time. Read more here and here
Click here for a summary of all the books.