[Libby peters' book](http://www.amazon.co.uk/Rock-Climbing-Essential-Skills-Techniques/dp/0954151119) is good and covers self rescue in detail.

![enter image description here][1]

It's also the offical book for the UK Mountain Leader and single Pitch award qualifications

There is a series on self rescue which I saw recently [on UKClimbing.com](http://www.ukclimbing.com/articles/page.php?id=3472), could be worth a watch

  [1]: https://i.sstatic.net/48j7d.jpg