Ignotofsky, Rachel 1989- creator author. text monographic 127 pages : color illustrations ; 20 cm "Inspire budding scientists with this new edition of the New York Times bestseller, created especially for younger readers!"-- U 990 Lexile U Raz-Plus by Rachel Ignotofsky. Q141.I33 509.2 9780593377642 9781526361004 DLC 20231211152536.0 1796 eng