Book Description
for The Hour of the Cobra by Maiya Williams
From the Publisher
Rowan, Nina, Xanthe, and Xavier have returned to Owatannauk and the resort/time portal that took them to French Revolution in The Golden Hour. The kids have permission to time travel, as assistants to Aunt Agatha and Aunt Gertrude in their mission to retrieve documents from library at Alexandria, before the collection is burned by Julius Caesar.
Publisher description retrieved from Google Books.