Retro Casio Software - Lucid 3-D Spreadsheet, User’s Manual, 1992, Operator Guide 

One major selling point of this product was being 3”-D (three dimensional). Any cell of the spreadsheet can contain a complete additional spreadsheet that you can access with a single keystroke. 311 pages, approx 6”x 8”. 

Book is in Good used condition with some soiling on the covers, very clean inside, no writing noticed, binding is tight & secure. Rare 1992 edition.