Haven't read the book you reference, but was in Leadville, CO several years back and picked up a pamphlet compiled by Emma Walling titled:
"John "Doc" Holliday
Colorado
Trials and Triumphs"
It is a collection of transcribed newspaper articles pertaining to "Doc" that appeared in Colorado newspapers between May 18, 1882 and August 23, 1985 (yes 1985). One of the articles is an interview of "Doc" conducted by a reporter for The Denver Republican that appeared in the Monday, May 22, 1882 edition (page 5 column 1, 2 & 3) of that publication. The article lead in reads as follows:
AWFUL ARIZONA
DOC. HOLLADAY TELLS THE STORY OF THE
COUNTRY OF RUSTLERS AND KILLERS.
HE PREDICTS THAT HE WILL BE KILLED SHOULD HE BE TAKEN TO
TOMBSTONE,
AND SAYS HE WOULD RATHER BE SHOT
DOWN HERE THAN MURDERED THERE.
DEATH BY THE HANDS OF AN OFFICER PREFERABLE
TO HANGING BY THIEVES.
Any possibility this is what you are looking for? The pamphlet also contains several newspaper articles pertaining to his death that were published in 1887.
Hamp