Three Part Invention, a novel by Judith Laura, is now available in multiple ebook formats as well as in paperback. With 20th century events as a backdrop, the novel focuses on three generations of mothers and daughters and their relationship to each other, to issues of ethnicity, and to music--from classical to jazz and rock and more. The author has added a book trailer video to the materials on the Click here, as well as Click here. Available for some time in paperback and Kindle ebook, the novel has recently also become available in just about all other ebook formats through multiple online retailers. In celebration through Dec. 31, 2012 the author is offering a 50% off coupon through Click here, which has the book available in most ebook formats. Use coupon code YD24V  (not case sensitive) at checkout.