These are some of my favorites.

Developing Math Talent by Susan Assouline and Ann Lupkowski-Shoplik

What High Schools Don�t Tell You by Elizabeth Wissner-Gross

Right Brained Children in a Left Brained World by Jeffrey Freed and Laurie Parsons

Upside �Down Brilliance by Linda Silverman

Losing Our Minds by Deborah Ruf

Smart Boys by Barbara Kerr and Sanford Cohn

Genius Denied by Jan and Bob Davidson/ Laura Vanderkam

Coloring Outside the Lines by Roger Schank