For those researchers who are not familiar with the above mentioned book, it was printed in 1904 and its 900+ pages contain hundreds of biographies of residents in the counties mentioned in the title, as well as historical and political information about these same counties. If you have any interest in the history of these counties, this book can be very helpful in your research.
The 300 biographies of Kittitas County residents have just been posted on the Ancestry Message Board for Kittitas County. Visit this board, and use the search feature to find the surname of your interest.
I, myself, have absolutely NO connection to any of the families mentioned in the biographies. I posted them hoping they would assist in someone's research. Good Luck.