Kyoichiro Kaga is a 5-book series with 5 primary works first released in 1986 with contributions by Keigo Higashino.
1986 • 1 Reader • 267 pages • 4
1986 • 1 Reader • 304 pages
1996 • 97 Readers • 288 pages • 4.2
2009 • 31 Readers • 3.9
2011 • 29 Readers • 352 pages • 4.1
2013 • 18 Readers • 4.2