There is no finite number of skill magazines. Skill magazines raise the corresponding skill by 10 for a short time, or 20 with the Comprehension perk. There are 4 skill books for each skill, except Science which has a fifth book as a quest reward ( Dead Money adds additional books, giving a total of 5 each, except Science which now has 6 and Survival which receives no additional book). During the quest Ain't That a Kick in the Head, you will choose three skills to receive a one-time boost of 15 points.
³ Will only appear if youve killed Motor-Runner. ² Will only appear if youve killed Vulpes Inculta.
¹ Will only appear if youve killed Caleb McCaffery during or after Debt Collector.
Initial skill levels are determined by your primary stats. This page lists all named characters in all mods by Someguy2000 for Fallout: New Vegas.