Skippyjon Jones in Mummy Trouble by Judy Schachner

El Skippito is back! His doggy pals want to visit the Under Mundo—the underworld—where mummitos rest in peas. But they need El Skippito’s brains and courage to answer the riddle of the Finx and enter the mummy’s tomb. Our hero is up to the task, and he’s in for another whirlwind adventure.