With cities across the country adding miles of bike lanes and building bike-share stations, bicycling is enjoying a new surge of popularity in America. It seems that every generation or two, Americans rediscover the freedom of movement, convenience, and relative affordability of the bicycle. The earliest two-wheeler, the draisine, arrived in Philadelphia in 1819 and astonished onlookers with the possibility of propelling themselves "like lightning." Two centuries later, the bicycle is still the fastest way to cover ground on gridlocked city streets. Filled with lively stories, The Mechanical Horse reveals how the bicycle transformed American life. As bicycling caught on in the nineteenth century, many of the country's rough, rutted roads were paved for the first time, laying a foundation for the interstate highway system. Cyclists were among the first to see the possibilities of self-directed, long-distance travel, and some of them (including a fellow named Henry Ford) went on to develop the automobile. Women shed their cumbersome Victorian dresses-as well as their restricted gender roles-so they could ride. And doctors recognized that aerobic exercise actually benefits the body, which helped to modernize medicine. Margaret Guroff demonstrates that the bicycle's story is really the story of a more mobile America-one in which physical mobility has opened wider horizons of thought and new opportunities for people in all avenues of life.

In the first book on this tragic event, "4:09:43," Hal Higdon, a contributing editor at Runner's World, tells the tale of the Boston Marathon bombings. The book's title refers to the numbers on the finish-line clock when the first bomb exploded.

In "4:09:43," Higdon views Boston 2013 through the eyes of those running the race. You will meet George, a runner from Athens, birthplace of the modern marathon, who at sunrise joins the eerie march of silent runners, all aimed at their appointments in Hopkinton, where the marathon starts. You will meet Michele, who at age 2 helped her mother hand water to runners, who first ran the marathon while a student at Wellesley College, and who decided to run Boston again mainly because her daughter Shannon was now a student at Boston University. You will meet Tracy, caught on Boylston Street between the two explosions, running for her life. You will meet Heather, a Canadian, who limped into the Medical Tent with bloody socks from blisters, soon to realize that worse things exist than losing a toenail.

In what may be a first, Hal Higdon used social media in writing "4:09:43." Sunday, not yet expecting what might happen the next day, Higdon posted a good-luck message on his popular Facebook page. "Perfect weather," the author predicted. "A 'no-excuses' day." Within minutes, runners in Boston responded. Neil suggested that he was "chilling before the carb-a-thon continues." Christy boasted from her hotel room: "Bring it "

Then, the explosions on Monday Like all runners, Higdon wondered whether marathoners would ever feel safe again. Beginning Tuesday, runners told him. They began blogging on the Internet, posting to his Facebook page, offering links to their stories, so very similar, but also so very different. Over the next several hours, days, and weeks, Higdon collected the tales of nearly 75 runners who were there, whose lives forever would be shadowed by the bombs on Boylston Street.

In" 4:09:43," Higdon presents these stories, condensing and integrating them into a smooth-flowing narrative that begins with runners boarding the buses at Boston Common, continues with the wait at the Athletes' Village in Hopkinton, and flows through eight separate towns. The story does not end until the 23,000 participants encounter the terror on Boylston Street. "These are not 75 separate stories," says Higdon. "This is one story told as it might have been by a single runner with 75 pairs of eyes."

One warning about reading "4:09:43" You will cry. But you will laugh, too, because for most of those who covered the 26 miles 385 yards from Hopkinton to Boylston Street, this was a joyous journey, albeit one that ended in tragedy. This is a book as much about the race and the runners in the race as it is about a terrorist attack. In future years as people look back on the Boston Marathon bombings, "4:09:43" will be the book that everyone will need to have read.

In December 1956 Ronnie Delany sprinted home to win the gold medal in the 1500m Olympic final in Melbourne, setting a new Olympic record in the process. In the depressed Ireland of the fifties, Delany's win - an outsider storming ahead to beat the favourites - caught the imagination of a nation, and made him a sporting icon. In Staying the Distance, Delany tells the story of his childhood in Arklow and Sandymount, his early triumphs on the Irish athletics circuit and his realisation that he had it in him to become a great runner. In 1954 Delany won an athletics scholarship to Villanova University in Pennsylvania where he trained under legendary coach Jumbo Elliot. To a naive Irish boy in the 1950s, American campus life was glamorous and exciting, and as well as athletics training, there were dances and study sessions, girlfriends and theatrical productions, all brought to life in his own words. Delany's speed was increasing all the time; in 1954, he reached the final of the 800m at the European Championships, and in 1956 became only the seventh runner to join the exclusive club of four-minute milers. Then came his phenomenal win in Melbourne, and a new Irish hero was born. Though most famous in Ireland for his Olympic win, Delany pursued his running career in the US, where from March 1955 through March of 1959 he ran thirty-four major indoor mile races against all kinds of opponents, domestic and foreign, and won them all. He broke the indoor world record for the mile three times. The excitement of indoor racing was enhanced by an orchestra; When Irish Eyes are Smiling was a popular number during Delany's incredible forty race winning streak. Fifty years on from the Melbourne Olympics, Ronnie Delany tells the story of his life and career in his own warm and engaging style. Lavishly illustrated with photographs spanning his athletic career, this is the story of one of Ireland's greatest and best-loved sportsmen.