It’s about time to wrap up the Lifehack Great Big Summer Giveaway, and we’ve got a gorgeous leather laptop bag from Sports Accessories to wrap it up with. And since you’re bound to have some space left in the bag, we’ll throw in a $100 Amazing gift credit from the folks at Ubernote so you can fill it up with books (or whatever). Last week , I asked what your favorite books are for relaxing with on a summer day. This week, I want to know what your favorite work-related books are: your favorites on business, entrepreneurship, marketing, project management, administration, innovation – anything that helps you help your organization run more efficiently, more productively, or more profitably. Sports Accessories Business/Laptop Case We opened our Summer Giveaway with a bag from Ellen Hart’s CareerBags.com. Today’s prize is a sort of bookend to that one; Ellen worked as a bag designer for years before starting CarrerBags.com, and Sports Accessories bags are her babies. You won’t find better-looking business cases on the market. Like the 2 Gusset Leather Computer Briefcase pictured here.Reinforced corners, steel ring-reinforced handle and shoulder strap attachments, push-lock clasps for security, pockets for documents, cell phone or reading glasses, pens and pencils — everything you could want or need in a business case, stell feet to protect the bottom, all wrapped up in a stylish design. But what sets these bags apart is not just thei ...