Question: What is the nationality of the writer of The Secrets of Sir Richard Kenworthy?

Context paragraphs:
Mausoleum of Sir Richard and Lady Burton: The Mausoleum of Sir Richard and Lady Burton is a Grade II* listed tent-shaped mausoleum of Carrara marble and Forest of Dean stone in the churchyard of St Mary Magdalen Roman Catholic Church Mortlake in the London Borough of Richmond upon Thames.  It contains the tombs of the Victorian explorer Sir Richard Burton (1821–90), who took part in the search for the source of the River Nile and translated "The Arabian Nights", and his wife Isabel, Lady Burton (1831–96), who designed it.  The coffins of Sir Richard and Lady Burton can be seen through a glass panel at the rear of the tent, which can be accessed via a short fixed ladder.  The inscription includes a commemorative sonnet by Justin Huntly McCarthy (1859–1936), who lived in Putney.

Lord Mayor of Liverpool: The office of Lord Mayor of Liverpool has existed in one form or another since the foundation of Liverpool as a borough by the Royal Charter of King John in 1207, simply being referred to as the Mayor of Liverpool.  The current Lord Mayor of Liverpool is the Right Worshipful Councillor Malcolm Kennedy who has held the post since May 2017.  The most prominent Mayors were the Stanleys of Knowsley, of which Sir Thomas Stanley (son of the 3rd Earl) and the 4th, 5th, 6th, 7th, 8th, 9th, 10th, 16th and 18th Earls of Derby have held this office since ancient times.  The Molyneuxs of Sefton have also held this office on numerous occasions over the centuries: Sir Richard Molyneux, his grandson Sir Richard Molyneux Baronet, the 1st Viscount Molyneux and the 7th Earl of Sefton.

The Secrets of Sir Richard Kenworthy: The Secrets of Sir Richard Kenworthy is a Regency romance written by Julia Quinn and published in 2015 by Avon Books.  Quinn's 24th novel is also the final installment of her series known as the Smythe-Smith Quartet.  It features Iris Smythe-Smith and the eponymous Sir Richard Kenworthy.  The novel reached number 2 on the New York Times Bestseller List and was in the top 10 for the "USA Today" bestseller list.

Guldeford baronets: The Guldeford Baronetcy, of Hempsted Place in the County of Kent, was a title in the Baronetage of England.  It was created on 4 February 1686 for Robert Guldeford.  The title became extinct on his death in circa 1740.  The Guldeford (or Guildford) family descended from Sir John Guldeford (d. 1493), Comptroller of the Household during the reign of King Edward IV.  After supporting the Earl of Richmond (later Henry VII), Sir John and his son, Sir Richard Guildford, were attainted by Parliament.  However, they were restored to favour after the accession of Henry in 1485.  Sir Richard gained prominence under Henry and notably served as Master of the Ordnance.  By his first wife Sir Richard was the father of Sir Edward Guildford, Lord Warden of the Cinque Ports and Master of the Ordnance, whose daughter Jane Guildford married John Dudley, 1st Duke of Northumberland.  Sir Richard Guildford's second son by his first wife, George Guildford, of Hempstead Place, Kent, was the father of Sir John Guldford, High Sheriff of Kent during the reign of Edward VI.  Sir John's son Sir Thomas Guldford entertained Elizabeth I in 1575.  Sir Thomas was the great-great-grandfather of Sir Robert Guldford, 1st Baronet.

Richard Munden (Royal Navy officer): Sir Richard Munden (1640–1680) was a captain in the Royal Navy.  He was the elder son of Sir Richard Munden (1602–1672) of Chelsea; the younger son was Rear-Admiral Sir John Munden.

Gus Kenworthy: Augustus Richard "Gus" Kenworthy (born October 1, 1991) is a British-born American freestyle skier from Telluride, Colorado who competes in slopestyle and the halfpipe.  Kenworthy won the silver medal in Men's freestyle skiing at the 2014 Winter Olympics in Sochi, Russia.

Earl Temple: The baronetcy of Temple of Stowe, in the Baronetage of England was created 24 September 1611 for Thomas Temple, eldest son of John Temple of Stowe, Buckinghamshire.  His great-grandson Sir Richard, 4th Baronet, was created Baron Cobham 19 October 1714, and Viscount Cobham and Baron Cobham 23 May 1718, the latter with a special remainder, failing his male issue (of which he had none) to his sisters and their heirs male.  On his death 13 September 1749 the barony of 1714 became extinct, the viscountcy and barony of 1718 passed to his elder sister, and the baronetcy passed to his second cousin once removed William Temple, of Nash House, who became 5th Baronet.  On the death of Sir William's nephew Sir Richard, 7th Baronet, on the 15 November 1786, the baronetcy became dormant.

Kenworthy Hall: Kenworthy Hall, also known as the Carlisle-Martin House, Carlisle Hall and Edward Kenworthy Carlisle House, is a plantation house located on the north side of Alabama Highway 14, two miles west of the Marion courthouse square.  It was built from 1858 to 1860 and is one of the best preserved examples of Richard Upjohn's distinctive asymmetrical Italian villa style.  It is the only surviving residential example of Upjohn's Italian villa style that was especially designed to suit the Southern climate and the plantation lifestyle.  It has a massive four-story tower, windows of variable size and shape with brownstone trim, and a distinctly Southern division of family and public spaces.  The building was designed and constructed for Edward Kenworthy Carlisle as his primary family residence and the centerpiece of his 440 acre estate.  It, along with some of its surrounding ancillary structures, was declared a National Historic Landmark in 2004.  The house and a purported ghost are featured as a short story in Kathryn Tucker Windham's "13 Alabama Ghosts and Jeffrey".

Julia Quinn: Julia Quinn is the pseudonym used by Julie Pottinger (born Julie Cotler in 1970), a best-selling American historical romance author, who says she chose her pseudonym so her Regency romances would be on bookshelves next to those of the successful romance writer Amanda Quick.  Her novels have been translated into 26 foreign languages, and she has appeared on the "New York Times" Bestseller List 18 times.

Richard Levett: Sir Richard Levett (also spelled Richard Levet) (died 1711), Sheriff, Alderman and Lord Mayor of London, was one of the first directors of the Bank of England, an adventurer with the London East India Company and the proprietor of the trading firm Sir Richard Levett & Company.  He had homes at Kew and in London's Cripplegate, close by the Haberdashers Hall.  A pioneering British merchant and politician, he counted among his friends and acquaintances Samuel Pepys, Robert Blackborne, John Houblon, physician to the Royal Family and son-in-law Sir Edward Hulse, Lord Mayor Sir William Gore, his brother-in-law Chief Justice Sir John Holt, Robert Hooke, Sir Owen Buckingham, Sir Charles Eyre and others.

Supporting paragraphs: The Secrets of Sir Richard Kenworthy Julia Quinn
Answer: American