Home › Authors › Stephen Hilbert Ph.D. 👤 Stephen Hilbert Ph.D. 3 books Books by Stephen Hilbert Ph.D. Barron's GMAT, 2007-2008 with CD-ROM (Barron's How to Prepare for the Gmat Graduate Management Admission Test) 2006 Barron's How to prepare for the GMAT, graduate management admission test 2004 Barron's pass key to the GMAT, graduate management admission test 1992