As I did three months ago, I once again delved into Barnes & Noble's quarterly conference call to get some insight into the latest book industry trends. Here are the highlights:CFO Joseph Lombardi is cautious but guardedly optimistic about sales in the all-important fourth quarter, saying that "the hardcover book business has improved" but there have been "some recent mixed retail sales reports."Following a slow second quarter, the third quarter saw a turnaround in sales. CEO Steve Riggio said that the increase in sales began with Bob Dylan's new CD, Modern Times.Diane Setterfield's The 13th Tale was "one of the most successful new hardcovers... The wonderful ghostly tale was our number one bestseller the first day it went on sale, and the book went on to break all previous Barnes & Noble sales records for a first-time novelist. Almost 60 days after publication, the book is still one of our top-selling titles, due to its word-of-mouth appeal."Fiction bestsellers for the quarter were Mitch Albom's For One More Day, Stephen King's Lisey's Story, Nicholas Sparks' Dear John, David Baldacci's The Collectors, and "rising fiction star" Vince Flynn's Act of Treason.On the nonfiction side, the bestsellers were John Grisham's The Innocent Man, Bob Woodward's State of Denial, Nora Ephron's I Feel Bad About My Neck, and Richard Dawkin's The God DelusionLooking at the fourth quarter, "Among the season's best gift books, the standout is clearly Annie Leibovitz's A Photographer's Life, but Martha Stewart's Homekeeping Handbook is off to a great start, as is the magnificent coffee table book called Rainforest."In October, Barnes & Noble upped its discounts for shoppers who belong to its member program. The company expects this to help sales, but its inability to say just how the numbers might work out made investors nervous, the issue being that this plan could put a serious dent in the bookseller's profit margin.Having said that, Barnes & Noble also noted that "margins continue to benefit from lower purchasing from book wholesalers, increased sales of our own publications, and an overall more efficient supply chain." - i.e. those books published by Barnes & Noble are quite lucrative for the company.