Problem: Renaissance are an English progressive rock band, best known for their 1978 UK top 10 hit "Northern Lights" and progressive rock classics like "Carpet of the Sun", "Mother Russia", and "Ashes Are Burning". They developed a unique sound, combining a female lead vocal with a fusion of classical, folk, rock, and jazz influences. Characteristic elements of the Renaissance sound are Annie Haslam's wide vocal range, prominent piano accompaniment, orchestral arrangements, vocal harmonies, acoustic guitar, bass guitar, synthesiser, and versatile drum work. The band created a significant following in the northeast United States in the 70s, and that region remains their strongest fan base.

As The Yardbirds were transforming into The New Yardbirds (with Jimmy Page) in 1968 and then Led Zeppelin, departing members Keith Relf and Jim McCarty formed an acoustic duo called Together.  They released "Henry's Coming Home" b/w "Love Mum And Dad" as a single on Columbia Records in November 1968 without chart success.  In January 1969, Relf and McCarty organised a new group devoted to experimentation with rock, folk, and classical forms. In his book Mountains come out of the sky: an illustrated history of prog rock, Will Romano quoted McCarty:  This quintet -- Relf on guitar and vocals, McCarty on drums and vocals, plus bassist Louis Cennamo, pianist John Hawken, and Relf's sister Jane as an additional vocalist -- released a pair of albums on Elektra (US) and Island (UK-ILPS 9112), the first one, titled simply Renaissance, being produced by fellow ex-Yardbird Paul Samwell-Smith.  The band had begun performing in May 1969, before recording had commenced for the debut LP, mostly in the UK, but with occasional forays abroad, including festivals in Belgium (Amougies, October 1969) and France (Operation 666 at the Olympia in January 1970, and Le Bourget in March 1970, both in Paris). In February 1970 they embarked on a North American tour, but that month-long trek proved only marginally successful. Because of their Yardbirds credentials, they found themselves paired with bands such as The Kinks and their new classically oriented direction did not always go down well because audiences were expecting rock/blues-based material.  Beginning in the late spring of 1970 as touring began to grind on them, the original band gradually dissolved. Relf and McCarty decided to quit performing, and Cennamo joined Colosseum. Hawken organised a new line-up to fulfill contractual obligations to Island Records and complete the band's second album, Illusion which had been left unfinished.

How successful was it?

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Background: Florence Leontine Mary Welch was born in Camberwell, London on 28 August 1986. Her father is Nick Russell Welch, an advertising executive. Her mother, Evelyn Welch (nee Evelyn Kathleen Samuels), is an American emigrant from New York City who was educated at Harvard University and the Warburg Institute, University of London. Evelyn is currently Professor of Renaissance Studies and Vice-Principal for Arts and Sciences at King's College London.
Context: According to Welch, the band name "Florence + the Machine" had "started off as a private joke that got out of hand. I made music with my friend, who we called Isabella Machine, to which I was Florence Robot. When I was about an hour away from my first gig, I still didn't have a name, so I thought 'Okay, I'll be Florence Robot/Isa Machine', before realising that name was so long it'd drive me mad". In 2006, Welch's performances with Isabella Summers in small London venues under the joint name Florence Robot/Isa Machine began to attract notice. In 2007, Welch recorded with a band named Ashok, who released an album titled Plans on the Filthy Lucre/About Records label. This album included the earliest version of her later hit "Kiss with a Fist", which at this point was titled "Happy Slap".  Florence and the Machine released their debut album Lungs in the United Kingdom on 6 July 2009. The album was officially launched with a set at the Rivoli Ballroom in Brockley, South East London. It peaked at number one in the UK and number two in Ireland. As of 6 August 2009, the album had sold over 100,000 copies in the UK and by 10 August it had been at number two for five consecutive weeks. Following its 25 July 2009 release for download in the United States, the album debuted at number seventeen on the Billboard Heatseekers Albums chart, ultimately peaking at number one. The album was released physically in the US on 20 October by Universal Republic. The album was produced by James Ford, Paul Epworth, Steve Mackey and Charlie Hugall.  Welch contributed vocals to David Byrne and Fatboy Slim's 2010 album Here Lies Love, an album about Imelda Marcos. As of January 2011, Welch was working with Drake on material slated for his upcoming album.  On 27 February 2011, Welch replaced pregnant Dido and sang her portion of Best Original Song nominee "If I Rise" (from 127 Hours) with A. R. Rahman at the 83rd Academy Awards.
Question: did they tour?
Answer: In 2006, Welch's performances with Isabella Summers in small London venues

Question:
Irving Fisher (February 27, 1867 - April 29, 1947) was an American economist, statistician, inventor, and Progressive social campaigner. He was one of the earliest American neoclassical economists, though his later work on debt deflation has been embraced by the Post-Keynesian school. Joseph Schumpeter described him as "the greatest economist the United States has ever produced", an assessment later repeated by James Tobin and Milton Friedman. Fisher made important contributions to utility theory and general equilibrium.
In 1898, Fisher was diagnosed with tuberculosis, the same disease that had killed his father. He spent three years in sanatoria, finally making a full recovery. That experience sparked in him a vocation as a health campaigner. He was one of the founders of the Life Extension Institute, under whose auspices he co-authored the bestselling book How to Live: Rules for Healthful Living Based on Modern Science, published in 1915. He advocated regular exercise and the avoidance of red meat, tobacco, and alcohol. In 1924, Fisher wrote an anti-smoking article for the Reader's Digest, which argued that "tobacco lowers the whole tone of the body and decreases its vital power and resistance ... [it] acts like a narcotic poison, like opium and like alcohol, though usually in a less degree".  Fisher supported the legal prohibition of alcohol and wrote three booklets defending prohibition in the United States on grounds of public health and economic productivity. He also defended eugenics, serving in the scientific advisory board of the Eugenics Record Office and as first president of the American Eugenics Society.  When his daughter Margaret was diagnosed with schizophrenia, Fisher had her treated at the New Jersey State Hospital at Trenton, whose director was the psychiatrist Henry Cotton. Cotton believed in a "focal sepsis" theory, according to which mental illness resulted from infectious material in the roots of teeth, bowel recesses, and other places in the body. Cotton also claimed that surgical removal of the infected tissue could alleviate the patient's mental disorder. At Trenton, Margaret Fisher had sections of her bowel and colon removed, which eventually resulted in her death. Irving Fisher nonetheless remained convinced of the validity of Dr. Cotton's treatment.
Answer this question using a quote from the text above:

who did he co-author the book with?

Answer:
Live: Rules for Healthful Living Based on Modern Science, published in 1915.