The Griffin Gate by Vashti Hardy
Good for reluctant readers!
"Warden Griffin at your service. Can I ask if you've seen a monster in the area ...?" Grace's family are wardens of the Griffin Map, using its teleport technology to fight crime across Moreland. Although Grace is still too young, she longs to go on missions herself.
After all, if her brother, Bren, can do it, why can't she?So when Grace finds herself alone with the map when a distress call comes in, she jumps at the chance to prove she's up to the task. But the map transports Grace to a remote village where nothing is quite as it seems ... Has she taken on more than she can handle? Be transported to a world like no other in this steampunk, fantasy adventure with family at its heart from Blue Peter Book Award-winner Vashti Hardy.