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In page Elvis Presley:

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The book Elvis: What Happened?, co-written by the three bodyguards fired a year prior, was published on August 1.[12] It was the first exposé to detail Presley's years of drug misuse. He was devastated by the book and tried unsuccessfully to halt its release by offering money to the publishers.[citation needed] By this point, he suffered from multiple ailments: glaucoma, high blood pressure, liver damage, and an enlarged colon, each aggravated—and possibly caused—by drug abuse.[13] His last appearance in public occurred during the early morning hours of August 8, 1977, when he rented the entire Libertyland amusement park in Memphis for himself and about ten others.[14]