A new book added to Amazon.com for preorder implies that Aperture 3.0 could be just around the corner coming in Spring 2010.

According to AppleInsider a new book, "Apple Aperture X(3) UNDER NDA: A Workflow Guide for Digital Photographers," which has a release date of May 26, 2010.

The book's ISBN number is 978-0240521787 and according to isbn.nu, it is not available anywhere else except Amazon, suggesting the posting was a mistake and the book is still under a non-disclosure agreement.