Could someone tell me where I can find a magazine to boost my explosives skills? Looking around Goodsprings and cannot find one. My skills are currently 17 and need to be 25 to convince Easy Pete to give me dynamite to fight the powder gangers. Thanks.

Have you checked all the mail boxes outside the houses in goodsprings?

They often have random skill books.

Aye, plus they seem to respawn with relative frequency or at least they have so far in my games.

That'll be the Patriot's Cookbook. Like mentioned, have a look around the mailboxes in Goodsprings. Remember there are a lot of them around the outskirts of the town. Otherwise, check merchants inventories for it. Remember it's completely optional to get Easy Pete's support however.