Rift Angel - Stuart Jaffe

Roni and Gram head to Ireland to inspect an open rift beneath an Abbey church. Just another day closing universes for the Parallel Society, but an exciting day for Roni. It's a chance for her to get out of the library and into the real world. It's a chance to spread her wings a little more.
But something is alive inside that rift -- something that wants to get out. The Abbey nuns are convinced the rift is a conduit to Heaven, and the thing inside is an angel. But Gram harbors a secret about the rift angel, one that haunts her. And soon Roni will learn that the nuns have secrets of their own.
The lies and secrets would be plenty enough to deal with. But when the rift is breached and an angel set loose, Roni will wish she could be back in the underground library!