Publishers Database

Last month writer Linda Formichelli compiled a free database of publishers' information at Review Copy Helper. Ostensibly the list is to aid book reviewers obtain copies of new books, but I don't see why it can't be used by any other writer, too. The listings include links to publishers' websites, physical addresses, email addresses, phone and fax numbers. For reviewers specifically, she advises:

When contacting a publisher to request a review copy, include your name, mailing address, phone number, and e-mail address; the name of your publication; and the title, author, and (if possible) ISBN of the book you're requesting. It's also nice if you can send the publicity department a copy of your review or article!