Geronimo, Thea, and Trap are exploring a mysterious old castle built by the founder of New Mouse City. Can they unlock all its rooms and discover its secrets?
Editions · 5
Paperback
2016 · Estrella Polar
128 pp · EN
9788416519972
Paperback
2016 · Estrella Polar
128 pp · EN
9788416519972
Paperback
2017 · Scholastic Inc.
224 pp · EN
9781338087789
Paperback
2017 · Scholastic, Incorporated
EN
9781338087796
Paperback
2025 · Sweet Cherry Publishing
112 pp · EN
9781802633153
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