Wonder Woman(TM) and Nubia, her twin sister, unite for an epic Amazon adventure in Atlantis in this Step into Reading leveled reader! When Queen Hippolyta sends her daughters, Wonder Woman and Nubia, to Atlantis to represent the Amazons, the Super Heroes team up with Mera to save the underwater kingdom from a dangerous foe! Young DC Super Hero fans ages 4 to 6 will enjoy this Step into Reading Step 2 leveled reader about teamwork starring Wonder Woman and Nubia, her Amazon sister. Step 2 Readers use basic vocabulary and short sentences to tell simple stories. For children who recognize familiar words and can sound out new words with help.