hi Z gundam was second on the anime market it came out in the 1980's a few years after the original Gundam, but with the newer gundam series like 008th team (0079) and War in the Pocket (0080) now released it is it is no longer second chronologically (Zeta took place in UC 0086) Amuro Ray is in the series as well. F-91 is a stand alone movie taking place far into the U.C. it has to do with the Seabook piloting the F-91 against the Crossbone Vanguard, it is a decent movie. there are alot of kits and books available for it and the F-90 series but not much else .
chris