5. BOOK REVIEWS: DARRYL D HOLM, GEOMETRIC MECHANICS, 2ND EDITION, IMPERIAL COLLEGE PRESS, LONDON, 2011. PART I: DYNAMICS AND SYMMETRY, XXIV + 441 PP, ISBN: 13 978-1-84816-774-2. PART II: ROTATING, TRANSLATING AND ROLLING, XX + 390 PP, ISBN: 13 978-1-84816-777-3.