| Huw Wilkins | Designer of the Mananan MacLir cover, this website and other works too numerous and wonderful to mention. |
| Big Finish Productions | Producers of the Doctor Who: Short Trips series of fiction anthologies as well as a wide range of other fantastic products. |
| Gallifrey One | The main website for Dr Who related information, reviews, news, links and much more. |
| Timeless Myths | This site contains some useful factual information on many areas of mythology including the Celtic myths that formed the basis of the novel. |
| Living Myths | Another excellent site by Steve Eddy containing information about celtic myths and deities as well as other myths of the ancient world. |
| Temple of Manannan Mac Lir | Do not be fooled by the alternate spelling, this is a pagan site devoted to Manannan Mac Lir as a living deity in a living religion. This site is interesting not only in this respect but also in the details of the myths and how they are incorporated within the pagan beliefs. |
| The Celtic Planet | This site is devoted to Celtic arts, crafts, music, ancient sites and monuments, folklore, specific celtic countries and locations. |
| Celtic Delights | This site focuses more on Celtic inspired metalworking and other arts and crafts. |
| Mananan Original Irish Surfware | Very cool site with surfing clothing based around celtic designs and inspired by Mananan MacLir, Lord of the Sea. Ride the waves. |