Guess that Saved By The Bell tell-all book isn’t selling so well. We hear Dustin “Screech” Diamond has been sued for more than $21,000 in unpaid property taxes.

The original cast of NBC’s Saturday Morning teen comedy banned the actor best known for his portrayal of lovable geek Screech from appearing alongside them on last week’s cover of PEOPLE Magazine because of his upcoming tell-all book about his former co-stars and the show. Other reasons for the snub include the Diamond’s infamous 2007 sex tape scandal, his widely reported IRS debt, and his behavior during his appearance on VH1’s Celebrity Fit Club.

Mark-Paul Gosselaar, who played Zack Morris on the original series, openly slammed his on-screen bestie in an interview with a recent issue of Newsweek.

“What is he going to say?” Gosselaar asked sarcastically. “We were (bleeping) groupies at 14? I can’t wait to read his book, because I don’t have a memory of a lot of the shows. Maybe it was because I was doing lines off of the audience members’ a—-. I’m sure he’s going to write something crazy like that. So he’s writing a book, I’m not really afraid of what he has to say. There are not too many skeletons in my closet.”

Thanks to various including Gosselaar’s public diss — as well as other cast members’ public comments — – Screech is talking to lawyers about possibly filing defamation lawsuit, The Chicago Sun-Times revealed in a report on Tuesday.

“I don’t think anyone has anything to worry about. That lawsuit’s not going anywhere.”

Screech Powers, Bayside High’s lovable geek, played by Dustin Diamond, was notably absent from the cast’s photo 20th anniversary reunion on the cover of PEOPLE last week.

RadarOnline insiders reveal that Dustin’s forthcoming tell-all Behind The Bell – which promises to dish the dirt on what really went on behind-the-scenes of NBC’s teen comedy — prompted his former castmates to ban him from the reunion.

“Cast members were not comfortable with including him,” a spokesperson for PEOPLE told Radar last Friday.

Screech the Snitch. Actor Dustin Diamond, best known for his role as the adorable geek “Screech” Saved By The Bell, has inked a deal with Gotham Books to write a juicy tell-all book about what really went on when the cameras stopped rolling on one of the most popular teen comedies in TV history.

Behind The Bell promises to detail “sexual escapades among cast members, drug use, and hardcore partying,” New York Magazine dished on Thursday.

Dustin Diamond, best known as Screech on the 80’s teen comedy “Saved By The Bell, may not have made any fans during his recent tenure as a reality star on VH1’s “Celebrity Fit Club,” but the actor isn’t dead. The actor was the subject of a death hoax that hit over the weekend.

The report read:

“Actor Dustin Diamond died while filming a movie in New Zealand early this morning – May 23, 2007. Preliminary reports from New Zealand Police officials indicate that the actor fell more than 60 feet to his death on the Kauri Cliffs while on-set. Specific details are not yet available.”

According to Wikipedia, the news story was generated on the www.fakeawish.com, a site that allows users to generate news stories formatted to appear as if they originated on Yahoo news.