On topic? Looking for old computer book

[Paul Heller]

I hope you don't mind me asking as this is not a tech quiestion per  
se, but if anyone in the world will know the answer it will be this  
group.

I'm looking for a book that I rented from a library in 1973 or 1974  
on computers. In the back of the book it has plans for building a  
computer out of basic components, including a telephone dial for  
input. The output is shown on lights and I remember there being more  
than a few bulbs. The "computer" probably does nothing more than add  
numbers. I use the book to research and write my 8th grade science  
paper and then I tried to build the computer for my 8th grade project  
but could not complete it at the time. Now that I'm older and wiser I  
figured I'd try again.... (mid life crisis?)

I don't remember any ICs. It was pretty simple electrical components.  
Anyone know the title or author of this book?

Thanks.

Paul