Leo Frankowski's last Science Fiction Series. Although 6 books were planned 3 were published before Leo Frankowski passed away: the first A Boy and His Tank (1999) set up the series, the second The War with Earth (2003) defined it, the third Kren of the Mitchegai (2005) introduced the universes Big Bad, the next was planned to be their first major conflict, followed by the long hard war, ending in a epic resolution. It should be noted that for 2/3rds of the series LF coauthored with Lieutenant Colonel Dave Grossman.