There are 3 titles associated with this person.

@book{ wphp_15054
  author={Zimmermann,Johann Georg},
  year={1792},
  title={Select views of the life, reign, and character of Frederick the Great, King of Prussia. Containing, besides many profound Remarks on the prominent Features of the Reign and Character of that unrivalled Sovereign, serving to illustrate his posthumous Works, two very remarkable Letters of the Empress of Russia to the Author; a great Variety of Anecdotes, relating to eminent political and literary Characters of Great Britain, and other Countries; and also an authentic Exposition of the origin and true causes of the British Alliance with Prussia, &c. &c. Translated from the German of Dr. de Zimmerman, First Physician to his Britannic Majesty at Hanover, Knight of the Russian Order of Wlodimir, and Member of several Literary Societies. By Major Neuman, of the Nassau Guards. ...},
  publisher={Thomas Hookham and James Carpenter [New Bond Street] \& Elizabeth Newbery},
  address={London},    }
@book{ wphp_21883
  author={Zimmermann,Johann Georg},
  year={1798},
  title={Solitude, written originally by J.G. Zimmerman. To which are added, the life of the author; notes historical and explanatory; a copious index; and seven beautiful engravings by Ridley.},
  publisher={Ann Vernor and Thomas Hood [Poultry] \& John Cuthell [4 Middle Row] \& John Walker II [44 Paternoster Row, 1784-1814, 1818-1825] \& Lackington, Allen and Co. \& James Nunn \& David Ogilvy and Son \& William Darton and Joseph Harvey [Gracechurch] \& William Otridge and Son \& Richard Lea [Greek Street, Soho]},
  address={London},    }
@book{ wphp_24947
  author={Zimmermann,Johann Georg},
  year={1799},
  title={Solitude, written originally by J. G. Zimmerman. To which are added, the life of the author; notes historical and explanatory; a copious index; and seven beautiful engravings by Ridley.},
  publisher={Ann Vernor and Thomas Hood [Poultry] \& John Cuthell [4 Middle Row] \& John Walker II [44 Paternoster Row, 1784-1814, 1818-1825] \& Lackington, Allen and Co. \& James Nunn \& David Ogilvy and Son \& William Darton and Joseph Harvey [Gracechurch] \& William Otridge and Son \& Richard Lea [Greek Street, Soho]},
  address={London},    }