Lincoln’s last days have been the subject of more extensive hagiography than for any other president, so it is tempting to dismiss Mr Achorn’s book, which focuses on the inauguration, as redundant. That would be a mistake. Its strength lies less in the events themselves than in the elaborate detail and rich historical context that he musters. Spring thunderstorms turn the parade route into a muddy quagmire that swallows shoes and ruins dresses. John Wilkes Booth relies on the father of his teenage mistress, a New England senator, for vip passes to both the inauguration and Ford’s Theatre, giving the murderer more than one chance to get to his victim.