Ext JS 4 First Look by Loiane Groner (Jan 10, 2012) $44.99 $39.99 Paperback Order in the next 11 hours and get it by Tuesday, Mar 19. More Buying Choices - Paperback $39.65 new (17 offers) $33.92 used (8 offers) (14) Eligible for FREE Super Saver Shipping. Sell this back for an Amazon.com Gift