Leish

Camden Market

The Natural History Museum, the V&A and the Science Museum – all very close to each other 

Hatchards, the oldest bookshop in the UK

Gay's the Word, the first LGBTQ+ bookshop in the UK

Waterstones Piccadilly, the largest bookshop in Europe

The London Dungeon

The Shard, for unbeatable views

Derelict London walking tours, for a different side of the city

The Globe and the Sam Wanaker Playhouse – the latter does performances by candlelight

For book locations in London, I'd recommend the app Squirl, which gives you a map of the city and alerts you to nearby landmarks that feature in books

The Mail Rail

St Dunstan in the East, is a former Anglican church that was heavily damaged during the Blitz, with the ruins left as a public garden

Probably not open at the moment due to coronavirus, but you can sometimes get into tours of the deep-level air raid shelter in Clapham South

A Sculpture for Mary Wollstonecraft in Newington Green, if you want to see one of the most controversial sculptures I remember being raised in London in recent years . . . 

The Magnificent Seven – notable Victorian cemeteries where various historical figures are buried

Westminster Abbey is also the resting place of many famous people (including Elizabeth I, Aphra Behn, Isaac Newton, Anne of Cleves and Charles Dickens) 

The opposite of Arcturus would be . . . a reckless, expressive, pissed-off mortal who doesn't like reading and can't hold her alcohol.