Simon R. Green is one of those authors who just overflows with awesome ideas -- in fact, often he will slap some of his awesome ideas into books that are otherwise unrelated.
So he does quite well in the short stories in "Tales of the Hidden World," a loose web of short stories about ghastly aliens, Droods, wizards, zombies and whatnot. Green's fertile imagination and zippy writing keep every short story entertaining and inventive, although at times I wondered if it was all meant to be in the same big messy universe that most of his books inhabit.
It begins with a bittersweet tale of the Drood Armourer, an old man reflecting on his life -- the woman he loved, the people he lost, the son who went rogue, and his feelings about the life he has led. It's a rather sad note for the collection to open on, but it's also an affectionate farewell for a character who has endured throughout the Secret Histories series.
Among the other tales: A snarky Dresden-Files-esque tale of a street wizard who polices the street at night, encountering a wacky assortment of aliens, vampires, Street Preachers and others.
*A homeless man's thoughts on the undead.
*A true story about meeting Death.
*An elderly Dorothy's last visit to Oz, and the discovery of the fantastical land's true nature.
*The hated and feared Lords and Ladies are called upon to defend Old Earth from the grotesque alien Medusae.
*"The House that stands on the border" between worlds, and what happens when it isn't properly maintained.
*Humans locked into robotic "hard suits" are sent to a dangerous jungle world, and discover it may be too deadly even for them.
*A conversation between Jesus and Satan about... well, the nature of reality.
*An investigative reporter who runs afoul of the Epicure, whose love of fine cuisine masks a horrifying secret.
*"Apocalypse Now" with an undead twist.
... and a bunch of Green's earliest works, such as some decent sword-and-sorcery, an environmental mood piece, a Soulhunter searching for the Hags, and several others.
The best description of "Tales of the Hidden World" would be a collection of odds and ends. "Question of Solace" is the only one that is explicitly tied to Green's other tales; the others seem to be mostly other kinds of short stories that floated out of his imagination, ranging from a true story to a "Wizard of Oz" fanfic to assorted standalone tales that he was inspired/challenged to write.
And short stories really work for Green's too-many-cool-ideas imagination -- he can crafts short stories all about some of these ideas (the Hags, who steal the souls of aborted babies) or weave them into a story all about how weird Soho is (a sewer-dwelling undine). His writing is snappy and snarky ("Inhumanly handsome, insufferably graceful, and almost unbearably arrogant. Not because he was a Prince, you understand, but because he was an Elf"), but he can also provide stories that are unexpectedly serious and poetic ("From Out of the Sun, Endlessly Singing").
"Tales of the Hidden World" is a nice little sampler of Green's work -- and while only one story is explicitly set in Green's usual universe, it's a fun and colorful collection of ideas, stories and early works.