The X Lab has published Troubleshooting Mac OS X, a new e-book dedicated to preventing or resolving common problems with Mac OS X. The 300+ page e-book is hyperlinked and cross-referenced, making it easy for readers to quickly find solutions to Mac OS X problems. Troubleshooting Mac OS X is written by Dr. Smoke, the screen name of a “Helper” on Apple’s Discussion boards. Pricing begins at US$15.00 for a single-user license — multi-user and site licenses are also available.