Two mice want to build a library for their mom's impressive book collection. To get the supplies they need, they must cross a bridge guarded by a friendly dragon who loves math problems. Will they be able to answer his questions correctly? This cross-curricular Spanish book helps advancing readers learn math. This fiction book supports early fluent readers on their journey to independent reading. Engage students' natural curiosity with fun and inspiring real-world stories. Perfect for shared or guided reading, this book cultivates lifelong reading success. This fiction book is written in Spanish.