Two New Science Fiction books in the Young Adult collection

Incarceron by Catherine Fisher        

Highly recommend these two books.  
Four stars! (out of 5)
 

When You Reach Me by Rebecca Stead

Incarceron is labeled Fantasy Fiction in the Library's online catalog.  There are elements of fantasy in Incarceron, however, I think it is Science Fiction in the Steampunk sub-genre.  What do you think - is it Fantasy or Science Fiction? 

When You Reach Me is cataloged as Space and Time Fiction.  It won the 2010 Newbery Medal.  NY Times Article