Biden memoir back at printers

The publisher of Sen. Joe Biden’s memoir, an instant bestseller for the presumed vice presidential nominee, is being reissued in paperback with a first printing of 100,000.

According to Nielsen BookScan, which tracks about 70% of sales, “Promises to Keep” had sold only 15,000 copies before last weekend’s announcement that Sen. Barack Obama had chosen Biden as his running mate. The memoir from Random House Publishing Group quickly reached the top 25 on Amazon.com and was out of stock as of Monday.