Here one can find additional information on mythical creatures. Sources could have information about 1 or even more myths / creatures. All has been catagorized under: Books; Videos; Websites.

Should I find more media forms I will update accordingly.
Also I will update the list as I come across more sources.
Should you wish to add your own, feel free to do so. Just make sure to add a note of what the source is about.

BOOKS:

1) A Wizard's BestiaryBestiality (by Oberon Zell-Ravenheart) - The book lists a number of mythical creatures with useful descriptions of each.

2) Arthur Spiderwick's Field Guide - Lists a number of creatures, mostly the commonly known ones. Though it is based on a fictional novel series, the creatures listed are actual mythical creatures.

3) DragonloreDragonwhore - (by Oberon Zell-Ravenheart) Detailed information about dragons.

4) Grimoire For The Apprentice Wizard - (by Oberon Zell-Ravenheart) It has a lot of details about wizardry, how to create spells, history and even a small bestiary

5) Creatures Of The Outer Edge - (by Loren Coleman) *Sorry, don't know much about this.*

6) Cryptozoology A to Z - (by Loren Coleman) *Sorry, don't know much about this.*

7) Vampires - (by Dr. Bob Curan) A field guide to the creatures that stalk the night

8) Encyclopedia Of The Undead - (by Dr. Bob Curan) A field guide to the creatures that cannot rest in peace

9) Lost Lands, Forgotten Realms - (by Dr. Bob Curan) Sunken Continents, vanished cities and the kingdoms that History misplaced

10) The World's Most Haunted Places - Compilation of records from Ghostvillage.com

11) The GhostX Files - Paranormal encounters, discussions and research from Ghostvillage.com
VIDEOS:1) Old / Black Shuck - Youtube video regarding the legendary black dog Old Shuck.2) Cerebrus - Youtube video with Cerebrus pictures.WEBSITES:1) Mythical Creatures - An alphabetical list of known mythical creatures. Some names link to incorrect information; could be due to the site still being updated.2) Cryptozoology - A blog site regarding rumors, sightings and personal experiences involving known mythical creatures.3) Encyclopedia Mythica - As the name implies, an online encyclopedia regarding Mythical creatures.
4) Becoming a Werewolf... - Again as the name implies. It's about werewolves and tranformation theories.5) MOTHMAN!VIDEOS: - The history of the mysterious Mothman sightings in Point Pleasant.6) Death / Curse List of The Mothman - A collected list of the deaths rumored to be tied in with the Mothman.

7) Ghostvillagewww.billgibron.wetpaint.com - A site dedicated to Ghost research and possible sightings.

8) Timeless Myths - A small collection of myths (Norse, Arthurian, Classical and Celtic)
9) World Mythologies - A collection of World Mythologies. As it is a wikipage, one can add their own knowledge to the mix.