Calling Thunderbirds is the second paperback novel released by Armada Books in 1966. The novel was written by John Theydon, and features another new adventure starring the International Rescue family of heroes.


Lady Penelope finds herself caught up in a dangerous game, when she and her cousin are kidnapped by The Hood while searching for ancient Inca treasures.


  • Calling Thunderbirds was republished with a new cover by Titan Books in 1990.