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authentication guides (html and pdf) - - -
antique and art prints (pdf 11mb)
identifying and authenticating photographs (old version, html)
identifying and authenticating photos (up to date, pdf 13mb)
identifying common materials in antiques (pdf)
black light : a beginner's guide (html)
forensic light: a beginner's guide (pdf)

online courses and textbook websites- - -
online course in photograph identification and authentication

philosophy/cognitive science/linguistics guides pdf ebooks- - -
conceits: human cognition and perception (2013 Eric Hoffer Award Finalist)
art perception (2015 Eric Hoffer Award Finalist)
introduction to ancient counting systems
return trip: aesthetics and epistemology (2014 Eric Hoffer Award Finalist)
strange beauty: aesthetics and epistemology (Follow up to Return Trip)

galleries, blog, miscellaneous - - -
early baseball memorabilia galleries
about fashion photos
identfication and authentication column at sports collectors daily

books in print at amazon - - -
books in print

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(c) david rudd cycleback