在這一集中Geronimo收到Dr. von Volt的邀請到了亞馬遜河的叢林去探險，他們能順利地找到藏著紅寶百的廟嗎？中間又會發生什麼事呢？這一系列的故事主角為四隻老鼠的探險故事，書中的Geronimo是報社的社長，Thea是Geronimo的妹妹，所有的故事的開始都是因為Thea撿到的地圖開始，後來他們的表哥Trap以及外甥Benjamin也加入了他們的旅程。相當有趣，適合8歲以上兒童閱讀。
It was my most thrilling adventure yet! My old friend Professor von Volt had discovered the location of the famous Ruby of Fire. And before I could let out a squeak of protest, my sister Thea had dragged me into race to be the first to find the legendary gem. The jewel was protected by thousands of ancient booby-traps -- a 'fraidy mouse's worst nightmare? Would I make it through with my fur?
