Steve Sande and Erica Sadun have created an US$4.99 guide for everyone who wants to get their Mac into shape before Mountain Lion hits this summer.

In “Getting Ready for Mountain Lion,” the authors lay out key strategies for deciding whether to upgrade or not, checking your Mac for readiness, and considering how your applications will be affected. The book offers info on how to clean up and optimize your system, prepare backups, and strategize about the upgrade so your Mac is clean and primed for the new OS.

Readers wukk discover how to streamline and back up your computer, create an emergency fall-back plan, and prepare for the upgrade itself. The book ends by exploring things you’ll need to know about after upgrading. For details go to http://itunes.apple.com/us/artist/erica-sadun/id479419289?mt=11 .