▁ 2 0 0 3 ▁edition : ▁) ▁ ▁The ▁P si ▁Corps ▁Tr il ogy ▁All ▁are ▁considered ▁canon : ▁written ▁by ▁Gregory ▁Key es . ▁ ▁Bab yl on ▁ 5 : ▁Dark ▁Gen esis ▁– ▁The ▁B irth ▁of ▁the ▁P si ▁Corps ▁( 1 9 9 8 , ▁) ▁ ▁Bab yl on ▁ 5 : ▁Dead ly ▁Rel ations ▁- ▁B ester ▁As c endant ▁( 1 9 9 9 , ▁) ▁ ▁Bab yl on ▁ 5 : ▁Final ▁Re ck oning ▁– ▁The ▁F ate ▁of ▁B ester ▁( 1 9 9 9 , ▁) ▁ ▁Hard cover ▁om n ibus , ▁The ▁P si ▁Corps ▁Tr il ogy . ▁Pub lished ▁January ▁ 1 , ▁ 1 9 9 9 ▁by ▁The ▁Science ▁F iction ▁Book ▁Club . ▁() ▁ ▁The ▁Cent a uri ▁Tr il ogy ▁All ▁are ▁considered ▁canon : ▁written ▁by ▁Peter ▁David . ▁ ▁Bab yl on ▁ 5 : ▁Leg ions ▁of ▁Fire ▁– ▁The ▁Long ▁Night ▁of ▁Cent a uri ▁Prime ▁( 1 9 9 9 , ▁) ▁ ▁Bab yl on ▁ 5 : ▁Leg ions ▁of ▁Fire ▁– ▁Arm ies ▁of ▁Light ▁and ▁Dark ▁( 2 0 0 0 , ▁) ▁ ▁Bab yl on ▁ 5 : ▁Leg ions ▁of ▁Fire ▁– ▁Out ▁of ▁the ▁Dark ness ▁( 2 0 0 0 , ▁) ▁▁▁ ▁All ▁three ▁books ▁are ▁collected ▁in ▁Leg ions ▁of ▁Fire . ▁Pub lished ▁ 2 0 0 0 ▁by ▁The ▁Science