Electric Butterfly has announced the publication of “The Developer
Sketchbook for iPhone Apps” (http://www.developersketchbook.com/) by
Dave Wooldridge. It’s available on Amazon.com for US$19.99.

The Sketchbook is designed to enable iPhone developers to quickly
mock-up their next iPhone app. Its grid-based design templates
provide visual guidelines for the accurate size and placement of
commonly used elements.

The Sketchbook includes: 100 pages of 320 x 480 grids for portrait
user interface design; 100 pages of 480 x 320 grids for landscape
user interface design; 200 pages of flowcharts for outlining an app’s
navigation; 100 pages of square grids for app icon design; and
dedicated space on every page for detailed notes.