I'm finding it difficult to recommend a similar novel, because ''The Devil's Triangle'' is such an amalgam of genres, with action, adventure, mystery and science fiction all incorporated into it. [[Gideon the Cutpurse by Linda Buckley-Archer]] is a great adventure, with plenty of mystery and a stylistically realised science fiction angle. [[Frozen In Time by Ali Sparkes]] is another novel I would perhaps recommend to those who enjoyed this one.