Seven Seas, Seven Skies

Set in Continental Europe, it depicts the adventures of British aristocrat Dorian Red Gloria and his alter ego Eroica, Europe's most wanted international art thief. His nemesis — Major Klaus Heinz von dem Eberbach, a German NATO intelligence officer — has tried for years to catch the man who claims each crime scene with a card signed "From Eroica with Love." Things are just getting started when a trio of telepathically linked teenagers becomes aware of Dorian's identity and plans to capture him. But their plot goes awry as the master thief branches out — no longer content with stealing great art, he's moving on. Now the trio must foil his attempts to kidnap their leader, Caesar, as they try to save the great art treasures of Europe! (Source: CMX) *Note: Includes 24 extra chapters.*

El Halcon is a prequel series to 7 Seas, 7 Skies. Set from 1581 to 1586 with flashbacks further into the past, this is the story of Tyrian Persimmon. Born to a Spanish mother with an English husband in this era of conflict between the two contries, Tyrian favors Spain. His father suspects that Tyrian is not his son because he doesn't look like the man at all, and regularly beats him. His mother's lover is discovered to be a Spanish spy and flees the country. Tyrian is determined to join the navy and eventually rejoin Geraldo. At the age of 19 he begins to make his ruthless way up the ranks of the English navy. (Source: Translated Treasures)