the name of the holistic beauty book is called "Earthly Bodies and Heavenly Hair" by Dina Falconi.
She doesn't quite call these oil rinses, instead she calls them hair/scalp emollients, but I was happy to see that she talks about how the various oils help to detangle the hair.
From book:
Hair and Scalp emollients include oils and pomades that soothe, nourish and soften the scalp and hair. . . they can be used for detangling the hair. They can either be applied to the hair at room temp. or used for hot oil treatments. They make your hair shiny, soft and more manageable. . . you can choose from carrier oils such as coconut, sesame, olive or jojoba. When applying oil or pomade to your hair, start by placing a very small amount on your fingertips and combing your fingers through your hair to distribute the emollient evenly. Massage the scalp as well. Apply more as needed. Beware of applying too much oil and ending up with slick, greasy hair, unless that is the effect you desire. Oil is very difficult to wash out if applied too thickly.
She also gives a pretty detailed description on hot hair oil treatments which is pretty typical--in terms of wrapping your hair in a plastic bag, etc. She suggests using "a rich carrier oil, such as jojoba or coconut" and then put the oil in a "heat-proof measuring cup and place in a hot water bath until it reaches 100-105 degrees. Then she says massage the warm oil into your scalp and brush it through hair until evenly dispersed. Keep hair covered for at least an hour, then wash hair for a shiny luxurious result. Note that it is not absolutely necessary to wash your hair after this treatment.
********"This procedure is also very helpful for untangling hair gnarls: workout the knots with finger or a comb while the hair is saturated with oil."
Here are some of the oil rinse recipes for dry hair:
Rosemary Olive Hair Oil--use as a cleansing and invigorating scalp and hair tonic for dry, brittle hair and flaky, itchy scalp. (The amounts she suggests are: 1oz. cold pressed olive oil and 30 drops of rosemary essential oil; but I think most of us would use a lot more).
For drier and more damage hair types, she says to substitute jojoba oil for the olive oil. For oilier hair, replace olive oil with sesame oil.
Coconut Cedarwood Lavender Hair Oil--a rich cleansing oil for conditioning hair and scalp
the cedarwood and lavender oil should be essential oils