updated 7:04 p.m. ET Jan. 10, 2008

LOS ANGELES - A San Diego sports marketer claims in a new book that he gave former Southern California running back Reggie Bush nearly $300,000 in cash while Bush was still in college.

Based largely on interviews with Lloyd Lake, who tried to secure Bush as a client for the marketing company he attempted to launch, “Tarnished Heisman” claims the 2005 Heisman Trophy winner was provided with hotel stays, cash for shopping sprees and money to buy and customize a car.

The book’s authors, Don Yaeger and Jim Henry, acknowledge that Lake “has been compensated in return for his full cooperation,” according to a story posted on the Los Angeles Times’ Web site Thursday. Lake’s family members also were quoted extensively.

The book hints that USC coaches may have known about some of the arrangements, but it does not provide evidence that any school official was aware of alleged improper gifts.

Bush has repeatedly denied any wrongdoing.

The NCAA and Pac-10 are investigating whether Bush and his parents took improper benefits during 2004 and 2005, when Bush was still playing college football.

If the NCAA determines that USC violated rules, the football program could have to forfeit victories from those seasons — when the Trojans won a national championship and lost in the BCS title game against Texas — and face additional penalties.

Slide show   The Week in Sports Pictures Manny messes up, the Tour takes off to Spain, Nomar returns and more. more photos

If Bush is found retroactively ineligible, he could lose his Heisman.

The book also contains transcripts of secretly recorded conversations that Lake claimed to have had separately with Bush and his stepfather, LaMar Griffin.

Lake and his former business partner Michael Michaels entered into an agreement with Bush and his stepfather to launch a marketing company with Bush as its main client.

The deal fell apart when Bush signed with established sports marketer Mike Ornstein.

Michaels reached an out-of-court settlement with Bush and has declined to comment. Lake is suing Bush to recoup $291,600 in cash and gifts that Bush and his parents allegedly accepted during Bush’s sophomore and junior seasons.

MORE FROM COLLEGE FOOTBALL

College football Section Front

Biggest cheers for Holtz during Hall ceremony Aikman says college career wasn't complete Players, coaches to be enshrined in Hall of Fame Notre Dame, Army to play at Yankee Stadium in 2010 Opinion: Meyer now college football's top coach A look at the college football coaching carousel Conference predictions from preseason publications Rivals.com notebook: Great BYU class gets even better CollegeFootballTalk on NBCSports.com Who is team of the decade? College football Section Front   Add College football headlines to your news reader: