Publisher ‏ : ‎ Penguin

Language ‏ : ‎ English

Format : Paperback ‏ 

ISBN-10 ‏ : ‎ 014136131X

ISBN-13 ‏ : ‎ 978-0141361314

ISBN-13 ‏ : ‎ 9780141361314

1) Bloodlines: The Ruby Circle 

After their secret romance is exposed, Sydney and Adrian find themselves facing the wrath of both the Alchemists and the Moroi in this electrifying conclusion to Richelle Mead's New York Times bestselling Bloodlines series. When the life of someone they both love is put on the line, Sydney risks everything to hunt down a deadly former nemesis. Meanwhile, Adrian becomes enmeshed in a puzzle that could hold the key to a shocking secret about spirit magic, a secret that could shake the entire Moroi world . . .