123

(okay - so I'm in a 3-6 grade library and there aren't many books with 123 pages! I grabbed the first "big" book I saw!)

The High King - Lloyd Alexander

As he reached the hill crest he saw flames and black billows of smoke.
At first he thought the camp had taken fire. He spurred Melynlas at top speed down the slope. As he drew closer, as the crimson tongues wavered against the sky in a bloodstained sunset and thesmoke rose and spread over the valley, he saw it was the Commot burning.
Outdistancing the troop, he galloped into Merin. Among the warriors from the camp, Taran glimpsed Eilonwy and Gurgi struggling vainly to quench the flames.