Book excerpt: Brain in a Jar tells the gut-wrenching year heart-warming tale of a pioneer in the fight against Alzheimer's disease. Dr Beauregard Lee Bercaw, an American neurologist and world traveller, believed from a very young age that Alzheimer's was coming for him just as it had for his father. In an attempt to outsmart and outrun the disease, Dr Bercaw embarks on one global adventure after another.