Legends is a collection of short stories written by established authors of modern fantasy writing in their own "worlds." This book is an excellent introduction to the writing style and talent of each of these writers.
"The Little Sisters of Eluria" by Stephen King fleshes out who and what the "Little Sisters" from King's Dark Tower series are; if you are not a Dark Tower fan, neither this story nor its characters will mean much to you.
"Runner of Pern" by Anne McCaffrey is certainly the weakest link in this book--unless the reader is looking for a light (very light) romance in a fantasy setting. Characterization is weak and plot is nearly non-existent. Although die-hard fans of the Pern series may not care.
Also uninspired is Robert Jordan's entry "New Spring," which is a prequal to his Wheel of Time series. Like the Wheel books, the writing is tired and the plot plodding.
The strongest entry is The Hedge Knight by George R. R. Martin. It is a stand-alone story set in the world of Song of Ice and Fire. Following the death of his mentor, Dunk, 17 finds himself knighted (a "Hedge Knight"--a knight unattached to a lord who sleeps among the hedges) and alone. He travels to the city to join a contest for Hedge Knights and make a name for himself. He is joined by 9-year-old Egg, a boy who insists on squiring for him. Dunk soon finds himself involved over his head with royalty, and about to lose his life. The writing is sharp and witty and the characters are compelling.
A close second is "The Burning Man" by Tad Williams, the story of certain pivotal events in a young woman's life--her first love and her stepfather's obsessive quest for the answer to a question that haunts him and nearly drives him to madness.
Other entries are by Terry Pratchett, Terry Goodkind, Orson Scott Card, Robert Silverberg, Ursula LeGuin, Tad Williams, and Raymond E. Feist.
With few exceptions, the stories are will written and entertaining, representing the wide variety of voices, styles, and themes in modern fantasy.