She raised the mental shields around her mind, smiled, and stepped further into the room.

Once that is done, I will guide your thoughts back into my mind and show you how mental shields work.

Today we will begin the first lesson toward your development of mental shields.

It has effective mental shields and will not permit itself to be read.

She increased the power of her mental shields, just in case.

The question is how long must you keep your mental shields up?

Her mental shields were all in place, as strong as she could make them.

He's a big, strong, smart psychic boy with more mental shields than I've encountered in a long while.

An alien who could erect mental shields against a mind master?

Which meant that either Jack had amazingly tough mental shields, or.