From publisher blurb:
Welcome to the Glimmerreach, one of many planes of existence parallel to the Material. Explore a new world that thrives on change, filled with exotic dangers, time-based elves, elemental chaos, untamed magic, and endless meteor showers.
You'll find the following within this compendium's 24 pages:
New rules for the chaotic location, including crossing methods, discoveries, terrain, warped magic effects, denizens, and interesting places
Adventure Hooks: new ways to start off an adventure to the fey realm
2 player races: from the everchanging aeon elves to the melodic syren
Fey-warped templates: New ways to alter characters and monsters to be more like the fey or reflect the warping effects of the Glimmerreach.
28 items: from the chaotic blade and arcana-infused gauntlets to the five prized relics of the aeon elves.
4 monsters: from the Arcane Shadows of raw magic or Sprites borne from arcane elements