The Guild of Specialists trilogy is a series of novels by British children's author Joshua Mowll, published by Walker Books.
The series follows the lives of Rebecca and Douglas MacKenzie in their quest to find their parents after they had gone missing on an expedition to the Sinkiang desert in China.
They meet up with their uncle, now guardian, Captain Fitzroy MacKenzie, who welcomes them onto his ship, the Expedient.
They stumble upon the Guild of Specialists, a secret society of which their uncle is a part, as they embark upon their journey.
The first book in the series, Operation Red Jericho, was published in 2005.