Get all 4 books. All Scholastic and in great condition other than a bit of flaking on the covers. Grade levels 5-7. Killer Species, Michael P. Spardlin, 225 pgs, ISBN 978-0-545-50671-7 Marcello In The Real World, Francisco X. Stork, 312 pgs, ISBN 978-0-545-05690-8 Rip Tide, Kat Falls, 313 pgs. ISBN 978-0-545-43175-0 The Book Of Time, Guillaume Prévost, 214 pgs, ISBN 978-0-545-10378-7