You spend a few weeks trying to navigate your way through the will-they-won't-they of Sam Richardson's Clarissa or Pamela and you start thinking, wow, these epistolary tragedies must be the longest books in the world. Well they're not. Not by a long shot. Richard Grossman's Breeze Avenue, the third installment of his American Letters Trilogy, is expected to come in at 3 million pages. The six copies he plans to print will be released in 4,000 volumes of 750 pages each.