goToPage = (path) ->
window.location.assign('/book/' + path) if path?
key 'right', -> goToPage($next_path) key 'left', -> goToPage($previous_path)
goToPage = (path) ->
window.location.assign('/book/' + path) if path?
key 'right', -> goToPage($next_path) key 'left', -> goToPage($previous_path)