Midnight on the Moon (Magic Tree House, Bk 8)
Midnight on the Moon - Magic Tree House, Bk 8 Author:Mary Pope Osborne, Sal Murdocca (Illustrator) Illustrated in black-and-white. Jack and Annie are whisked forty years forward in time and land at an international space station on the moon. There they don space suits and go exploring the lunar surface in search of the fourth object needed to free the enchantress Morgan le Fay from a powerful spell.
I personally have not read this number in the series, but my kids love them all! My oldest read through all he had, now his 8 yr old brother is getting into them. I have read a few and think they are great for the imagination!