MyPublisher today announced the availability of a free iPhoto plug-in that will allow Mac users to create their albums in iPhoto but then order the finished PhotoBooks directly from MyPublisher. To encourage users to try the plug-in trial, MyPublisher is offering the first 5,000 Mac users who download the plug-in a coupon for 1 free 20-page hardcover PhotoBook. To receive the free book coupon, Mac users just need to visit the Web site and download the free plug-in. This free book offer is for Mac iPhoto users only.