3 books in series
Ponderables: 100 Discoveries that Changed History, Who Did What When
Ponderables: 100 Discoveries that Changed History, Who Did What When is a 3-book series with 3 primary works first released in 2010 with contributions by Tom Jackson.
Ponderables: 100 Discoveries that Changed History, Who Did What When
2010 • 139 pages
Ponderables: 100 Discoveries that Changed History, Who Did What When
2012 • 168 pages
Ponderables: 100 Discoveries that Changed History, Who Did What When
2017 • 144 pages