Warden: Melody of the Undergrowth Deluxe Edition Add-On includes:

• Full-length two-disk original soundtrack including bonus and unreleased tracks, from 3 artists.
  
• 127-page digital PDF book filled with concepts and behind the scenes looks at the art and making of Warden.

OST Track Listing

Disc 1 - Main OST

• (Grove Set) Great Tree Grove, Hanging Village, Towering Trunk
  
• (Sewers Set) Canals, Caves, Clockworks
  
• Battle
  
• (Town Set) Factorum Zone, Tree Zone, Mine Zone
  
• (Factorum Set) Grand Foyer, Water Wing, Lava Wing, Storage Maze
  
• (Pyramid Set) Central Terminal, Mud Caves, Maze Chamber
  
• Boss
  
• Climb
  
• Final Boss

Disc 2 - Bonus Tracks

• Cave
  
• Warden Theme
  
• Warden Theme (Piano)
  
• Immortal Bones
  
• Invasion of Ruins
  
• Tavian - Heir to an Emperor
  
• Polto Encounter
  
• Speleology
  
• Treefairer
  
• Warden

"Making Of" Book Contents

• The World of Warden
  
• The Wardens
  
• Denizens of the Forest
  
• Adversaries of Warden
  
• The Trinkets of Warden
  
• Level Iteration History
  
• Tech Art
  
• Texturing

I've bought the Deluxe Edition! Where is the content?

You can find the PDF book and OST in the Warden install folder, on Windows this will be something like C:\Program Files (x86)\Steam\steamapps\common\WardenMotU