Which trilogy features recurring characters Luis Marquez and Celestina?
"The Engine of Inferno" "Cogs of Havana" "Gears of Shadows" "The Timekeeper's Heir"
Which trilogy features recurring characters Luis Marquez and Celestina?
A. "The Engine of Inferno"
B. "Cogs of Havana"
C. "Gears of Shadows"
D. "The Timekeeper's Heir"
Answer: B. "Cogs of Havana"