Blizzard of the Blue Moon is one of the greatest book by Mary Pope Osborne! Jack and Annie to New York City, 1938, during the time of the Great depression.
Their mission is to save the very last unicorn to stop the terrible blizzard. They get to know more about the unicorn as they meet Balor and Grinda,the apparintices of the Dark Wizard.
Jack and Annie sucess on saving the unicorn at the end.
I liked the part they meet Teddy,Kathleen,Morgan,and Merlin and recieve
the Wand of Dianthus for proving to Merlin they can use magic wisely and with thought. I highly recomend this book.