The authors are Robert Carroll and Alan D. Viard and the subtitle is The X Tax Revisited, published by AEI. Here is a summary excerpt:
…we propose an X tax, consisting of a flat-rate firm-level tax on business cash flow and a graduated-rate household tax on wages. The tax would completely replace the individual and corporate income tax, the estate and gift taxes, and the Unearned Income Medicare Contribution tax slated to take effect in 2013.
Those interested in tax policy should read this book, which covers some of the tricky issues — such as the transition, or international income — more carefully than do most sources.