The ISBN of The Lost Slayer is 0-7434-1226-1.

Brimstone - 1998 Slayer 1-7 was released on:

USA: 11 December 1998

The cast of The Slayer Vol. 1 - 1996 includes: Lisa Ortiz as Lina Inverse

Toby the Vampire Slayer - 2013 Toby's Revenge 1-1 was released on:

USA: 26 May 2013

Well, I do not know your slayer level, but I can say Slayer is one of the most profitable and exciting skills to train your combat. Slayer is a slow skill so I would be uncertain on how long you are willing to fight monsters. The only way to train Slayer is by getting Slayer tasks from the Slayer masters so try there first. Speaking to the Slayer master in the Edgeville Dungeon should be good for you. If your Slayer level is low then try speaking to the lower-level Slayer masters first and then build up to better ones.