No. The Magic Tree House series has 47 books.
Yes, as of 2010, there were 48 books in the Magic Tree House series. The 49th book, "Stallion by Starlight," was published in 2013, and the 50th book, "Hurry Up, Houdini!" was published in 2013.
Number 40 is called "Eve of the Emperor Penguin" and was published on September 23rd, 2008. Books 41 and 42 were released in 2009, and books 43 and 44 in 2010.
Magic Tree House Space Mission - 2010 was released on: USA: 14 June 2010 (Chapel Hill, North Carolina)
The 44th Magic Tree House book is A Ghost Tale for Christmas Time and it was published in 2010.
Team Umizoomi - 2010 Presto's Magic House 3-8 was released on: USA: 18 May 2012
There are 28 books in the Magic Tree House series. There are 19 books in the Magic Tree House Research Guides. There are 11 books in the Magic Tree House Merlin Mission books. There are 58 books in total. There may be more in the future, but if there is more, these are all I know about. Sorry if there are any mistakes!
Magic Tree House #44 is called A Ghost Tale for Christmas Time set to be released in September 2010.
Magic - 2010 was released on: USA: 2010
Magic Tree House #43 is called Leprechaun in Late Winterand was released on January 12, 2010. It was available from most retail and online bookstores.The next two books, #44, A Ghost Tale at Christmas Timeand #45 A Crazy Day With Cobras, have all been released. They are currently available from most retail and online bookstores and the books have been highly successful both commercially and critically.
The author Mary Pope Osborne wrote the Magic Tree House series beginning in 1992. The 41st and 42nd books were published in 2009, the 43rd and 44th books in 2010. These are accompanied by non-fiction supplements (Research Guides) written by Osborne, her husband Will, and her sister Natalie Pope Boyce.(*Books from chapter 29 on are titles as "Merlin Missions")
It is called Leprechaun in Late Winter and was released on January 12, 2010.
The cast of Fifty - 2010 includes: Kaine Barr as Craig
Misplaced Magic - 2010 was released on: USA: October 2010