Butterflies of Alaska – 2nd edition! Available now.

The second edition includes the recently described (2016) Oeneis tanana as well as addresses several taxonomic issues; a flight-period graphic has been added. The book  pages have been reformatted such that there is coverage of only one species per page.  Maps have been updated to reflect additional records obtained after the first edition was published.

http://www.akentsoc.org/documents/field-guide-to-alaska-butterflies