Borovik, Alexandre, Gardiner, Tony. The Essence of Mathematics : Through Elementary Problems / Alexandre Borovik and Tony Gardiner. - Cambridge : Open Book Publisher, c2019. - xv, 374p. : - OBP series in mathematics, . Includes index. ISBN: 9781783746996 Subjects--Topical Terms: Mathematics. Dewey Class. No.: 510 / BOR/E