A Question

For my summer reading for school I need some help.....I have two choices of books:
1. The Book Thief-Mark Zusak http://www.goodreads.com/book/show/19063.The_Book_Thief 
about 550 pages, appox 2-4 days to read depending on if I like it or not
2.The Count of Monte Cristo-Dumas, translated by Lowell Blair http://www.goodreads.com/book/show/7126.The_Count_of_Monte_Cristo
about 1243 pages, approx I really don't know how many, never read a book this long before

I have no idea which to choose because '2' sounds more interesting but will take longer..........