155D: book about a wizard and companions

Book about a wizard/sorcerer, a ring carved in the ground around a castle to create a forcefield.  evil sorcerer makes spiders or insects appear and a guard runs and touches the forcefield which then collapses.  maybe an apprentice with wizard, used to read a lot of choose your own adventure books?

 

1 thought on “155D: book about a wizard and companions

  1. Kate

    Most likely not because the other details don’t match, but Patricia C. Wrede’s Talking to Dragons does have wizards and a force field over a castle.

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