[Coco] Bill Barden's "Connecting the CoCo to the real world" book available?

[Alexander Wallace]

Hi All, 

I’m reading “A CoCo Dual Trace Oscilloscope” in Rainbow Vol. 9 No. 8 (March 1990) and it mentions a book from William Barden that I can’t find references of online, except for a mention of someone having it in this thread (https://groups.google.com/forum/#!msg/bit.listserv.coco/V-oMpnn2644/CQcvUhrFnhEJ <https://groups.google.com/forum/#!msg/bit.listserv.coco/V-oMpnn2644/CQcvUhrFnhEJ>) …

Anyone knows if the book is available somewhere, somehow?

Thanks!