Download of iBooksPreview 3.0.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X was originally produced by TheDashBoard. The program lies within System Tools, more precisely Dashboard Widgets. We recommend checking the downloaded files with any free antivirus.
From the developer:
Preview brand new free and paid Books from the iBooks store right in your Mac OS X Dashboard. Supports displaying free books with all their content as well as sample pages from the paid books with the possibility to use the built-in search feature to look for other books.
You may want to check out more Mac applications, such as iPhotoMini, MIXPOD.com Music Player or OrariFS, which might be similar to iBooksPreview.