E. and G. G. Hook was a pipe organ designing and manufacturing company, located in Boston, Massachusetts, which operated from 1827 to 1935.
The Hook brothers were sons of a cabinet maker in Salem, Massachusetts, where they apprenticed with the organ builder William Goodrich.
Some remain in unaltered, original condition, such as the three-manual instrument at First Unitarian Church in Jamaica Plain, Massachusetts; others have been tonally and/or physically altered due to changing trends in the organ world during the 20th century.
Among the more notable features of this instrument are likely a result of having to fill such a large space; namely the use of imported reeds from Zimmerman of Paris, bold mixtures, cornets and a Tuba Mirabilis made in the Hook factory.
[6] They published several editions of their "Green Book", which served as a source of general information about pipe organs as well as catalog and advertisement for their firm.