I liked birth story type books whilst thinking about applying - just to get a taste of what birth is like, what helps, goes wrong etc. Try 'Babycatcher' by Peggy Vincent, 'Spiritual Midwifery' by Ina May Gaskin, 'Call the Midwife' and 'A Midwives Tale' - can't remember who they're by! Also I really enjoyed 'Birth - a history' by Tina Cassidy. The link caz has given you gives some great pointers for text books. Enjoy!

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waving, not drowning!!