Shakespeare authorship researchers are beginning to embrace the publishing options available through e-publishing. Several important anti-Strat books have been recently released for Kindle and other e-readers:
Hamlet and the Scottish Succession by Lilian Winstanley ( edited by Mark Alexander
Publisher Text.com, Dec. 2011
I Come to Bury Shakespeare by Steve McClarran
Publisher Stephen Steinberg, Dec 2011
The Apocraphal William Shakespeare by Sabrina Feldman
Dog Ear Publishing, Nov. 2011 (also in paperback)
Shakespeare by Another Name, Second Edition by Mark Anderson
Publisher Untreed Reads, 2011
Wheel of Fire by G. Wilson Knight (Shakespeare interpretation - Stratfordian)
Published by Oxford University Press (1930)
FREE download for e-readers from Internet Archive
Even if you don't own a Kindle, you can read Kindle formatted books on your computer by downloading the Kindle software free from Amazon.com. Mark Anderson recommended this Dec. 26, 2011article on the blog Open Culture: the best free cultural and educational media on the web for information about using your Kindle and other e-readers.
Update 01/03/12: Hank Whittemore announced yesterday that a Kindle edition of The Monument, his book on the sonnets, is now available. Check his post at:
Update 01/15/12: Mark Alexander has published several out-of-print Shakespeare authorship books as well as his Shakespeare's Knowledge of Law as Kindle editions. See the list under Mark Andre Alexander's name on Amazon.