So what are you saying? You think an early witcher universe with Vessimer in it is interesting. But not about how everything started, rather just monster contracts or some other plot? I've played the games but I haven't read the books (yet). So I'm not sure how much suitable material there is in the books to build something from.I'm pretty sure the answers to all those questions were answered in The Witcher 1 in journal entries.
IIRC, the Witchers were created by a master Elven swordsman and an alchemist. They were created to kill monsters (everyone knows that.) There are different school because The Witchers are not a tightly knit organization like the Jedi Knights or historical Knights Templar. Each school teaches a slightly different combat style. The school of the Wolf focuses on martial abiltity; especially swordsmanship. The Witchers declined because (A) they were no longer needed as the human kingdoms grew strong and adapted to the dangerous world they entered during the conjunction of spheres (B) humans innately fear what is diffferent from them and what they don't understand, and once the Witchers were no longer needed they began to be persecuted. The Wolf school was famously massacred during a pomgram that killed all the Witchers living at Kaer Morhen. Only Vessimer survived.
Of course, part of the point of The Witcher series is that The Witchers are in decline and they don't necesarily even want to revive their order. They're a member of a dying caste that used a wicked means to accomplish a noble end. They recogonize the method of creating a Witcher isn't exactly ethical and choose not to continue it. In all the games, Bertram, Letho, and Lambert each have their turn playing the "anti-hero" Witcher to emphasize this (in literature, an "anti-hero" is someone who resists the call to duty or greatness, btw.)


