Rudolf Erich Raspe (March 1736 – November 1794) was a German librarian, writer, and scientist, called by his biographer John Carswell a "rogue". He is best known for his collection of tall tales, also known as Baron Munchausen's Narrative of his Marvellous Travels and Campaigns in Russia, originally a satirical work with political aims.
Raspe was born in Hanover, and baptized on 28 March 1736. He studied law and jurisprudence at Göttingen and Leipzig and worked as a librarian for the university of Göttingen. In 1762, he became a clerk in the university library at Hanover, and in 1764 secretary to the university library at Göttingen. He had become known as a versatile scholar and a student of natural history and antiquities, and he published some original poems and also translations of Ossian's poems. In 1765 he published the first collection of Leibniz's philosophical works. He also wrote a treatise on Thomas Percy's Reliques of Ancient English Poetry.
In 1767, he was appointed professor in Cassel, and subsequently librarian. He contributed in 1769 a zoological paper to the 59th volume of the Philosophical Transactions, which led to his being elected a a Fellow of the Royal Society of London, and he wrote voluminously on all sorts of subjects. In 1774, he started a periodical called the Cassel Spectator. From 1767, he was responsible for some collections of Frederick II, Landgrave of Hesse-Kassel (or Hesse-Cassel). He had to flee to England in 1775 after having gone to Italy in 1775 to buy curios for the Landgrave. He was found to have sold the Landgrave's valuables for his own profit. He was ejected from the Royal Society that same year for his "divers frauds and gross breaches of trust".