By Kris Bell, Lars Ivar Igesund, Sean Kelly, Michael Parker; Apress, 2008, ISBN10 1590599608, ISBN13 9781590599600. Introduces D, concise, thorough overview of syntax and features, and Tango software library.
By Magnus Lie Hetland; Apress LP, 2002, ISBN 1590590066. Readable guide to ideas most vital to new users, from basics common to high level languages, to more specific aspects, to a series of 10 ever more complex programs. [Apress]