This is a collection of enchanting stories of varying length; several long enough to have been released as separate books.
The setting is our earth far into the future. We apparently failed to develop any space travel, and with multitudes of cities and civilizations rising and falling over the aeons, technology eventually was superseded by a magic based on true mastery of math (which curves all time and space). This magic too, has mostly been lost and forgotten to most, while a few still strive to follow the great masters. The surface of our earth is rich with ruins built upon ruins, every corner filled with dark, long forgotten secrets and things bearing witness to humanity's past failures and mishaps.
There is a thin red thread linking the stories, but they are distinct stories and only some have the same characters.
Be prepared to fall in love with more than a few of the characters, the superbly terse dialogs and just about everything else.