George III's Children (1992) Crowns in a Changing World: The British and European Monarchies 1901-36 (1993) Kings of the Hellenes: The Greek Kings 1863-1974 (1994) Childhood at court 1819-1914 (1995) Northern Crowns: The Kings of Modern Scandinavia (1996) King George II and Queen Caroline (1997) The Romanovs 1818-1959: Alexander II of Russia and his Family (1998) Kaiser Wilhelm II: Germany's Last Emperor (1999) The Georgian Princesses (2000) Dearest Vicky, Darling Fritz: Queen Victoria's Eldest Daughter and the German Emperor (2001) Royal Visits in Devon and Cornwall (2002) Once a Grand Duchess: Xenia, Sister of Nicholas II (with Coryne Hall) (2002) William and Mary (2003) Emperor Francis Joseph: Life, Death and the Fall of the Austro-Hungarian Empire (2005) Sons, Servants and Statesmen: The Men in Queen Victoria’s Life (2006) A Divided Kingdom: The Spanish Monarchy from Isabel to Juan Carlos (2007) Jonathan Wild: Conman and Cutpurse (2009) William John Wills: Pioneer of the Australian Outback (2011) Alfred (2013), revised version of Dearest Affie The Prussian Princesses (2014) Prince Henry of Prussia (2015) Princess Helena: Queen Victoria's Third Daughter (2015) The Last German Empress: A Life of Empress Augusta Victoria, Consort of Emperor William II (2015) Charlotte and Feodora (2015) Dictionary of Royal Biographers (2015) The First German Empress: Empress Augusta, Consort of Emperor William I (2016) Queen Victoria and the European Empires (2016) Daughter of Prussia: Louise, Grand Duchess of Baden, and her Family (2017) Of Royalty and Drink (2017) The End of the German Monarchy (2017) The Dukes of Clarence (2018) Sarah Forbes Bonetta (2018) The Dukes of Cumberland (2019) The Heroine of Gaeta (2019) Hugh Shortland (2019) The End of the Habsburg Monarchy (2019) George FitzClarence (2020) James II and the First Modern Revolution (2021) Ena and Bee: Queen Victoria's Spanish granddaughters [edited by] (2022) William IV: The Last Hanoverian King of Britain (2022) Queen Victoria's Daughters-in-law (2023) Music Roxeventies: Popular Music in Britain 1970-79 (1982) The Roy Wood Story (1986) Beyond the Summertime: The Mungo Jerry Story (with Derek Wadeson) (1990) Gilbert & Sullivan's Christmas (2000) - anthology Roy Wood: The Move, Wizzard and Beyond (2014) The Little Book of The Beatles (2014) Jeff Lynne: The Electric Light Orchestra, Before and After (2015) Pop Pickers and Music Vendors (2016) A Beatles Miscellany (2016) We Can Swing Together: The Story of Lindisfarne (2017) Electric Light Orchestra: Song by Song (2017) While You See a Chance: The Steve Winwood Story