Like the Foundation series, it is a collection of stories that originally appeared separately in magazines.

I had no objection to earning a little more money by having the Foundation series reprinted in book form.

For one thing, it is an obvious precursor to my successful "Foundation" series.

It is one of two prequels to the Foundation series.

From that moment on, the Foundation series took off and began to earn increasing royalties.

Because of that the Foundation series became enormously well-known.

Pop told me I should read the Foundation series.

Novels marked with an asterisk * have minor connections to the Foundation series.

The book's connection to the Foundation series is contested, but several links have been established.

This book takes place in the same universe as the Foundation series.