NIghtfall

http://hip1.sjvls.org/ipac20/ipac.jsp?session=144322MS32A15.26498&menu=search&aspect=subtab255&npp=20&ipp=20&spp=100&profile=thq&ri=2&source=~!horizon&index=.TW&term=Nightfall++.AW%3DHalpern&x=22&y=24&aspect=subtab255Nightfall by Jake Halpern

Accidentally left behind on an island where the sun only rises once every several years, three children discover that they are not alone and flee through an alien landscape of deadly hazards, unexpected transformations, and dark truths.