During the HP-28S’ heyday I acquired one of everything I could find related to the HP-28S. So I am somewhat surprised to find that I do not have the book you mentioned. I am wondering if it was actually published.

I found “Electrical Engineering” (00028-90103) mentioned in rear of “Mathematical Applications” (00028-90111). These numbers are for the “Step-by-Step Solutions For Your HP Calculator” series. The book I have is “HP-28S Software Power Tools, Electrical Circuits”, A Product of Solve and Integrate Solutions Corporation, from grapevine Publications. HP part # 92220X.

Solve and Integrate took over the HP user’s library in 1988. Grapevine published a number of books for the HP calculators. I am wondering if publication of 92220X might have resulted in scuttling plans to publish 00028-90103. It does have an HP part number.

Anybody on this forum have any information as to whether or not this book was actually published?

“Electrical Circuits” has 247 pages plus fronts piece, contents, index, etc. The typical Step-by-Step book for the 28 runs around 100 pages.

If you want a copy of 92220X look here:

http://www.bookfinder.com/search/?ac=sl&st=sl&qi=I0twtbHqVo1MXBbDeYW3Qooa4SQ_4947972888_2:1:3

Prices range from $15.93 to $150.86 and seem to depend more on who is trying to sell than on condition. If you can get a decent copy inside of $25 it will probably beat my trying to photocopy mine. I did not find 00028-90103 either at this site or at Amazon.