Buying a book at Barnes and Noble

Wanted to buy myself a new (techie/geek) book today. It’s $10-15 cheaper if I have B&N ship it to me, getting it to me by Tues/Wed, or $10-15 more expensive, if I drive the 5 miles to the local B&N store to have it in my grubby hands today. Tough choice. I was interested in reading it today, but I think I’m going to be patient and have it shipped. On the other hand, now that I “have” to wait for it, I’m questioning whether I really need the book, and therefore, I just might throw up my hands and say: “Skip it”.