2 books i have found very good are; "Practical Sheep Keeping", by Kim Cardell, which was a great all round book for beginers. And absolute must is "A Manual of Lambing Techniques", by Agne Winter and Cicely Hill. The second of these is an ironclad guide to lambing, i have often found myself elbow deep in a ewe going WHAT!!! and opened the book and found the correct answer, even if that was to call vet.