Have you ever been in a position where a vulnerable, defenceless or exposed loved one needs protection from undue influence and pressure from others to change their last Will and Testament? Many families may find themselves in this situation and are unsure of what to do or who to approach for help. English law states that when writing a will, an individual must comprehend the nature of the act that they are engaging and 'no insane delusion shall influence his will'. In his new book, Dr Hugh F O'Donnell brings us a comprehensive guide to establishing 'testamentary capacity', explaining the importance of making a will, and how best to go about this. This comprehensive and helpful book provides guidance for a wide audience, including legal professionals and family doctors, alongside the general reader. Hugh looks at the future and the protection of the vulnerable, offering a useful pre-probate protocol for doctors and offers welcome and useful advice to all involved in this complex and sensitive area.