<<Was there a circle requirement to get in the shop?

To buy a custom spellbook?

Do the generic spellbooks teach as well as the custom ones? >>

No circle req. No circle req to buy a custome spellbook. You can buy a custom spellbook for any guild you choose (so even traders, thieves etc can buy) however it'll ask you twice before you do to make sure.

Generic spellbooks teach nothing. They're for RP purposes.

Jalika