The Grand Tour is a 20-book series with 20 primary works first released in 1985 with contributions by Ben Bova.
2005 • 7 Readers
1985 • 6 Readers • 392 pages • 4
1992 • 30 Readers • 607 pages • 3.6
2002 • 4 Readers • 384 pages • 4
2004 • 2 Readers • 437 pages
2007 • 4 Readers • 396 pages • 2.5
2011 • 5 Readers • 3.5
2009 • 2 Readers