Former U.S. Solicitor General States Theodore Olson (R), a conservative, teams up with liberal attorney David Boies (L) to challenge California's Prop. 8, which banned same-sex marriage.
The bipartisan legal team leading the fight for gay marriage has a book deal.
Democrat David Boies and Republican Theodore B. Olson have signed with Viking.
The book even has a title: "A Just Cause: Law, Love, and the Case for Marriage Equality.''
Viking told The Associated Press on Wednesday the book is scheduled to be released sometime next year.
Boies and Olson have formed an unlikely partnership to represent the challengers to Proposition 8, approved by California voters in 2008.
The ballot initiative overturned a state Supreme Court decision allowing gay marriage.
Justices on the U.S. Supreme Court will hear arguments in the California case on March 26.
Viking is an imprint of Penguin Group (USA).
It promises the book will be a "dramatic, intimate, and informed account'' of the case.