The Importance Of The EARTH BOOK

Poul Anderson's "Territory," collected in his Trader To The Stars, quotes from his "Margin of Profit," which is collected in his The Earth Book of Stormgate.

"The Trouble Twisters," collected in The Trouble Twisters, refers to Adzel's student days on Earth, which were later described in "How To Be Ethnic In One Easy Lesson," collected in the Earth Book.

In "The Three-Cornered Wheel," collected in The Trouble Twisters, the Polesotechnic League has no reason to trade on Ivanhoe but a reason has been found by the time of "The Season of Forgiveness," collected in the Earth Book.

In The People Of The Wind, there is a joint human-Ythrian colony on Avalon. Four stories collected in the Earth Book describe first contact with Ythri, then the exploration of Avalon and two stages of its colonization.

Hloch's Earth Book introductions are written in the aftermath of the Terran War described in The People Of The Wind.

Satan's World describes the Shenna affair which is referred to as having happening ten years previously in "Lodestar," collected in the Earth Book.

Ivanhoans, Ikranankans, Cynthians, Wodenites and Vixenites introduced in various works come together in the Supermetals company as described in Mirkheim and in Lodestar," collected in the Earth Book.