Source
68
80
80
Beautiful and brilliant sorcerer girls just can't have nice things, huh? All I wanted to do was swipe a little bit of bandit treasure. Now suddenly I'm being chased around by icky trolls, nasty demons, mean mummies, and brooding golem bad boys. And for what? A tiny little artifact that can bring about the end of the world? Hah! I'll show them there's a reason you don't cross Lina Inverse... (Source: J-Novel Club)
Prequel
Lina Inverse, a wandering sorceress and bandit-killer, joins forces with roving swordsman Gourry Gabriev in what's supposed to be a quick union of convenience. *Note: This is the main Slayers manga, adapted from the Slayers novels vol.1-8. The fourth volume is adapted from the Slayers Return movie.*
Alternative
Lina and Gourry are separated and Lina wakes up in a strange land that is outside of the mazoku barrier. There, she meets a boy named Lyos who is the Knight of Aqualord. Eventually Lina was reunited with Gourry, and Ameria appeared. They must search the God's power but the appeared Riskfalto, the Deep Sea Dolphin's general and all they will be involucred in a battle between gods and demons.