There is plenty of material available on the Nibiru and Anunnaki connection, such as the book We Are the Nibiruans: Return of the 12th Planet by Jelaila Starr. This book, and related material, such as by Zecharia Sitchin, are interesting for 'alternative history' readings of the possible origins of humankind. For a highly recommended sci-fi reading on this theme I would suggest Doris Lessings 'Shikasta' (although not a light read).
A good 5 minute video overview is available from this video below, courtesy of 'Grey':
2012, Nibiru, Anunnaki and Reptilian Bloodlines
And thanks to Surfing the Tao for recommending disclose.tv!