Eve of the Emperor Penguin by Mary Pope Osborne is part of the Magic Tree House series of chapter books for children. It is set in modern times and the kids magically end up in Antarctica to help find something to cheer up Merlin. It does have some unrealistic magic stuff, but that is what the books are about. At the same time, though, it has some very realistic Antarctic experience information, such as the danger of ice cracks and the volcano Mount Erebus.
Overall this is a decent book. It is rather simple, but it is does give a decent look at how current research works in Antarctica. Definitely a good book for those that are already fans of the series. It is somewhat educational on its own, but match it with the Magic Tree House Research Guide on Penguins and Antarctica for a good brief introduction to the continent and penguins for kids.