Books: Sibling Revelry

MUNDOME

by A.G. MOJTABAI

154 pages. Simon & Schuster. $6.95.

He didn 't know if he was alive

and the girl was dead

He didn't know if the girl was alive

and he was dead

He didn't know if they both were alive

or both were dead

—T.S. Eliot, Fragment of an Agon

In fairy tales the prince sometimes saves his skin and pushes the plot forward by turning into a succession of wild creatures. Trapped on a cliff, he may become a magpie and fly away. Blocked by a lake, he is transformed into a silver fish who swims...