Tyler Blackthorne, the amazing author of Denali is regarded as a highly skilled story-teller, but Tyler is also well known for these reasons:

Black belt in karate.
Speaks fluent Spanish and German.
Has published scores of articles in main stream print magazines under a different name.
Has a total of 5 graduate and post graduate degrees.
Is author of three other books under a different name
Honored by the National Teachers Hall of Fame
Has traveled throughout North and South America, Asia and Europe

Tyler Blackthorne as you’ve figured out, is a pseudonym. The Portland, Oregon father-daughter writing team of Bruce and Kelly Hansen was joined by Minnesota scientist/writer Bob Young to write the first Dylan Baker book, Denali.

Arctic Forces is a creation of Bob Young and Bruce Hansen with editorial advice from Kelly Hansen.

The third book in the series, The Wolves of Kila Ikpic, is by Bruce Hansen with editorial advice from Bob Young and Kelly Hansen.

Image of climber barely hanging on