Question: Who has written the biography of Meriwether Lewis (August 18, 1774 – October 11, 1809) was an American explorer, soldier, politician, and public administrator?

Context paragraphs:
SS Meriwether Lewis: The SS "Meriwether Lewis" (Hull Number 170) was a Liberty ship built in the United States during World War II.  She was named after Meriwether Lewis, an American explorer who, along with William Clark, led the Corps of Discovery which explored the American West.

Undaunted Courage: Undaunted Courage: Meriwether Lewis, Thomas Jefferson, and the Opening of the American West (ISBN  ), written by Stephen Ambrose, is a 1996 biography of Meriwether Lewis of the Lewis and Clark Expedition.  The book is based on journals and letters written by Lewis, William Clark, Thomas Jefferson and the members of the Corps of Discovery.  While most of the book is dedicated to the expedition, several chapters are also devoted to Lewis's early life as a Virginia planter and Jefferson's personal secretary, and his later life as governor of the Louisiana Territory before his untimely death in 1809.

Meriwether Lewis Clark Sr.: Meriwether Lewis Clark Sr. (January 10, 1809 – October 28, 1881) was an architect, civil engineer, politician, and a general in the Confederate Army during the American Civil War.  He first served in the Trans-Mississippi Theater as the initial commander of the Ninth Division of the Missouri State Guard and later commanded a brigade in the Army of Northern Virginia under Robert E. Lee during the Siege of Petersburg and Richmond.

Lewis County, Tennessee: Lewis County is a county located in the U.S. state of Tennessee.  As of the 2010 census, the population was 12,161.  Its county seat is Hohenwald.  The county is named for explorer Meriwether Lewis, who died and was buried at Grinder's Stand near Hohenwald in 1809.

Philadelphus lewisii: Philadelphus lewisii (Lewis' mock-orange)—also known as Gordon's mockorange, Indian arrowwood, wild mockorange (though this can apply to any species in the genus) and syringa—a name that usually refers to the unrelated lilacs.—is a deciduous shrub native to western North America, from northwestern California in the Sierra Nevada, north to southern British Columbia, and east to Idaho and Montana.  It is widespread but not very common, usually appearing as an individual plant amongst other species.  It was first collected by scientist and explorer Meriwether Lewis in 1806 during the Lewis and Clark expedition and the "Philadelphus lewisii" is named after him.

John Shields (explorer): Private John Shields (c1769–1809) was, at about 35 years old, the second oldest member of the Lewis and Clark Expedition and its oldest enlisted member.  Shields, born in Virginia's Shenandoah Valley, moved at about 14 years old to the wilderness of Tennessee, helped build and lived in a family fort that provided protection from Native Americans, traveled with Captain Meriwether Lewis, Second Lieutenant William Clark, and Native American Sacagawea to the Oregon Coast where he helped build Fort Clatsop, and then returned to St. Louis, Missouri.  At the completion of this great adventure Shields hunted and trapped with the famous American pioneer Daniel Boone.

Meriwether Lewis: Meriwether Lewis (August 18, 1774 – October 11, 1809) was an American explorer, soldier, politician, and public administrator, best known for his role as the leader of the Lewis and Clark Expedition, also known as the Corps of Discovery, with William Clark.

The Meriwether: The Meriwether is a pair of condominium towers in Portland, Oregon's South Waterfront district, in the United States, which were completed in 2006.  They are named in honor of noted explorer Meriwether Lewis.

John Maley: John Maley (ca. 1776, New York-July 16, 1819, Goose Creek, South Carolina) was an American explorer and a contemporary of Meriwether Lewis, William Clark and Zebulon Pike.  In 1815, he wrote a journal of his travels through the trans-Mississippi West in the early 19th century.

USS Lewis and Clark (SSBN-644): USS "Lewis and Clark" (SSBN-644), a "Benjamin Franklin" class ballistic missile submarine, was the first ship of the United States Navy to be named for the explorers Meriwether Lewis (1774–1809) and William Clark (1770–1838), who carried out the Lewis and Clark Expedition of 1804–06.

Supporting paragraphs: Undaunted Courage Meriwether Lewis
Answer: Stephen Ambrose