Amrita Tripathi and Kamna Chhibber

£4.99

John Colapinto

£20.00

Michelle Ribeiro

£9.49

Clay Drinko

£12.99

Steven Hassan

£12.99

Billy Baker

£11.99

Christina S. Wilcox

£14.99

Bob Raleigh

£11.99

David Robert Grimes

£9.99

Gwen Tarpley

£9.99

Carey Davidson

£12.99

Gina Gomez

£8.49

Pier Bryden, M.D. and Peter Szatmari, M.D.

£10.33

Carl Honoré

£12.99

Amrita Tripathi and Arpita Anand

£6.49

Karyl McBride

£9.99

Howard S. Becker

£11.99

Lloyd Sederer

£16.99

(Part of TED 2)

Alan Lightman

£8.99

Sherianna Boyle

£7.99