It is common knowledge that the blue light emitted from the screens of our phones, computers and televisions can have a disruptive effect on our sleeping patterns. So a hotel in London has come up with the perfect antidote. Sheraton Grand London Park Lane has partnered with its neighbour, Hatchards, the oldest bookseller in the UK capital, and Dr David Lewis, a sleep expert and chartered psychologist, to create the ZZZ-list. This exclusive library contains a specially curated selection of books that will help guests get the best possible night’s sleep during their stay at the hotel. A total of 30 fiction and non-fiction titles have been included, in accordance with a specific set of guidelines established by Lewis. These include books that use short sentences - lengthier sentences produce long slow (alpha) waves in the brain found in a relaxed state, rather than short faster waves (beta waves). Concluding chapters that satisfy the brain’s desire for completeness were another desirable attribute when it came to putting together the ZZZ list. An incomplete chapter creates the "Zeigarnik Effect", a nagging feeling at the back of your mind that something has been left undone, which makes sleep less likely. Books that avoid a large amount of detail and follow a simple narrative structure also help the reader drift off, Lewis maintains. The more complicated the story structure, the greater the cognitive effort needed to make sense of it. The books sit within a dedicated library in the hotels’ Club Lounge and have been categorised into age brackets: Generation Z, Millennial and Generation X. They can be accessed by bibliophiles staying in suites and club rooms, as well as members, and guests can either read in the comfort of their room or in the lounge, where they can also access breakfast, beverages and canapes throughout the day. “A leading theory suggests that sleep may provide the brain with an opportunity to rebalance itself. Falling asleep in a bed that isn’t your own can be difficult and the ever growing use of smartphones and tablet computers during evening hours can cause sleep disturbances – meaning those staying in a hotel can sometimes find it harder to get to sleep,” says Lewis. The library even contains books that were chosen specifically to appeal to a Middle Eastern audience. These include <em>Architect's Apprentice</em> by Elif Shafak, <em>Palace Walk</em> by Naguib Mahfouz<em>, Yacoubian Building </em>by Alaa Al Aswany and<em> What I talk About When I Talk About Running </em>by Haruki Murakami. In case you are looking for some inspiration for your own library, here is a full list of the books on the Sheraton Grand London Park Lane’s ZZZ-list: <em>Tangerine </em>by Christine Mangan <em>Penguin Book of English Short Stories</em> by Christopher Dolley <em>Architect's Apprentice</em> by Elif Shafak <em>The Improbability of Love</em> by Hannah Rothschild <em>The Mermaid and Mrs Hancock</em> by Imogen Hermes Gower <em>Still Me </em>by Jojo Moyes <em>Don't Point That Thing at Me</em> by Kyrii Bonfiglioi <em>Palace Walk </em>by Naguib Mahfouz <em>Circe </em>by Madeline Miller <em>Story of Mr Sommer</em> by Patrick Suskind <em>Conversations with Friends</em> by Sally Rooney <em>The Seven Deaths of Evelyn Hardcastle</em> by Stuart Turton <em>Wind, Sand and Stars</em> by Antoine de Saint-Expurey <em>Last Orders</em> by Graham Switft <em>Collected Dorothy Parker</em> by Dorothy Parker <em>Diary of a Provincial Lady</em> by E.M.Dellafield <em>The Loved One</em> by Evelyn Waugh <em>What I Talk About When I Talk About Running</em> by Haruki Murakami <em>Lucky Jim</em> by Kingsley Amis <em>This is What Happened</em> by Mick Herron <em>The Young Hornblower Omnibus</em> by C.S. Forester <em>Jonathan Livingstone Seagull</em> by Richard Bach <em>The Complete Hercule Poirot Short Stories</em> by Agatha Christie <em>Hotel du Lac </em>by Anita Brookner <em>Yacoubian Building </em>by Alaa Al Aswany's <em>The Lemon Table</em> by Julian Barnes <em>One Fine Day</em> by Mollie Panter-Downes <em>Violins of St Jacques</em> by Patrick Leigh Fermor <em>Century Girls</em> by Tessa Dunlop