Invisible Sun : A Guide for the Soul from Rumi’s Master, Hardcover by Attar; Wolpe, Sholeh (TRN), ISBN 0063424738, ISBN-13 9780063424739, Like New Used, Free shipping in the US “The first comprehensive English collection from one of the world’s most influential mystics, Attar, the twelfth-century poet Rumi called his master”– Provided by publisher.