This anthology is a pleasant surprise for fans of speculative fiction as James Blish passed away in the 1970s, but as this work will prove he was and still is one of the best. The ten stories, introduction, and a poem were all written in 1950s and 1960s. Each of the ten tales is a superb example of why Mr. Blish is still considered a genius by the genre's writers. The tales are complex in spite of each being relatively short. Intricate but exciting writing is a trademark of this author and this anthology provides that and more. Fans of science fiction short stories will want to read this powerful collection and this reviewer also recommends the novels BLACK EASTER and THE DAY OF JUDGMENT for an interesting spin on the War for Heaven and earth.