Complex sentence: The Jewel of St Petersburg is 2010 novel is prequel to The Russian Concubine and The Concubine's Secret by Kate Furnivall and is about Lydia Ivanova Friss's parents Valetina Ivanova and Jens Friss love against the backdrop of Russia.
Split into simpler sentences: The Jewel of St Petersburg is a 2010 prequel to The Russian Concubine and The Concubine's Secret by Kate Furnivall. It is about Lydia Ivanova Friss's parents Valentina Ivanova and Jens Friss love, set against the backdrop of Russia.