Whitman Publishing is calling for volunteers as it prepares the latest Cherrypickers' Guide to Rare Die Varieties of United States Coins. The next book in the series will be the sixth edition, volume I, covering half cents, large cents, Flying Eagle and Indian Head cents, Lincoln cents, two- and three-cent pieces, Shield nickels, Liberty Head nickels, Buffalo nickels, and Jefferson nickels. The deadline for volunteered information is Friday, October 31, 2014.

The Cherrypickers' Guide shows collectors how to "cherrypick"-that is, how to examine a collection of seemingly normal coins, looking for unusual characteristics like doubled and tripled dies, overdates, repunched mintmarks, and other uncommon features that make a variety rare and valuable.

Die-variety specialist Mike Ellis is serving as general editor for the sixth edition, volume I. Bill Fivaz (founder and coauthor, along with J.T. Stanton, of the Cherrypickers' Guide) is involved in an editorial capacity.

The book's editors are looking for dealers, collectors, and other specialists with insight on new varieties to add to the book; listings that are no longer viable and should be deleted; and updated values, rarity rankings, and Interest and Liquidity factors. High-resolution photographs, current knowledge of the buy-sell-trade markets, analysis of dies, new research, and other information is welcome. Volunteers will be acknowledged in the book's credits.

Anyone interested in volunteering can contact Whitman Publishing at cherrypicker@whitman.com. Emails sent to this address are distributed to Fivaz, Ellis, Whitman publisher Dennis Tucker, and Whitman associate editor John McCurdy.