Science of Discworld is a 4-book series with 4 released primary works first released in 1999 with contributions by Ian Stewart, Jack Cohen, and Terry Pratchett.
#1 of 4 in Science of Discworld
1999 • 79 Readers • 414 pages • 4.3
#2 of 4 in Science of Discworld
2002 • 54 Readers • 345 pages • 4.3
#3 of 4 in Science of Discworld
2005 • 53 Readers • 354 pages • 4.4
#4 of 4 in Science of Discworld
2013 • 42 Readers • 352 pages • 3.8