NEW YORK — An unauthorized and highly anticipated book about Alex Rodriguez is coming out a month sooner than planned.

Publication of Selena Roberts' "A-Rod: The Many Lives of Alex Rodriguez" has been moved up from May 19 to April 14 as scrutiny builds on the New York Yankees slugger after he acknowledged using banned substances from 2001-2003 while playing for the Texas Rangers.

"A-Rod," which reportedly includes salacious details about Rodriquez's private life, was originally titled "Hit and Run: The Many Lives of Alex Rodriguez." Publisher HarperCollins, which this week listed the new release date on its Web site, has announced a first printing of 150,000 copies.