When I first considered locking my hair I did some research. I wanted to learn about the historical and cultural context of dreadlocks and it origins.... Below are some good sources.
Books
Rastafari and other African-Caribbean worldviews / edited by Barry Chevannes
The Rastafarians : the dreadlocks of Jamaica / Leonard E. Barrett
Dreads by Francesco Mastalia , Alfonse Pagano
Hair Story: Untangling the Roots of Black Hair in America by Ayana Byrd, Lori Tharps
Tenderheaded: A Comb-Bending Collection of Hair Stories by Pamela Johnson
No Lye: The African American Woman's Guide To Natural Hair Care by Tulani Kinard
Good Hair: For Colored Girls Who've Considered Weaves When the Chemicals Became Too Ruff by Lonnice Brittenum Bonner
That Hair Thing: And the Sisterlocks Approach by Joanne Cornwell
Hairstories by Kim Curry-Evans , Susan Krane , Neal A. Lester , Charles H. Nelson , Kevin Powell , Pamela Sneed
Natural Woman / Natural Hair: A Hair Journey, Hairstyles and Hairstories From the Front with simple step-by-step instructions on taking care of your natural hair by T'Kenyan Keymah
Hairlocking: Everything You Need to Know : African, Dread and Nubian Locks by Nekhena Evans
Nice Dreads: Hair Care Basics and Inspiration for Colored Girls Who've Considered Locking Their Hair by Lonnice Brittenum Bonner
Going-natural: How to Fall in Love With Nappy Hair by Mireille Liong-a-kong
Where Beauty Touches Me by Pamela Ferrell , Carmen Lattimore
Plaited Glory: For Colored Girls Who've Considered Braids, Locks, and Twists by Lonnice Brittenum Bonner
Nappyisms: Affirmations for Nappy-Headed People and Wannabes! by Linda Mosetta Jones