The Coordinate


Marc Jacobs - 2019
    When they are assigned to work together on one last history project, they hardly expect the monotony of high school life to change. Instead, as they decode a series of unexplained clues hidden within their history project itself, Logan and Emma manage to unfold an ancient mystery that has baffled scientists and archeologists, one with powerful implications for the present day. As they embrace the adventure they’ve stumbled upon, and a growing romantic attraction to each other, Logan and Emma find themselves caught up in a dangerous, high-stakes race across the globe to decipher mankind’s past in order to save humanity’s future, not to mention their very own lives, with a mystery that just might reach towards the stars…

Einstein's Riddle: Riddles, Paradoxes, and Conundrums to Stretch Your Mind


Jeremy Stangroom - 2009
    The eponymous riddle, according to legend, was devised by Albert Einstein as a child. He claimed that only about 2% of the population would be able to work out the correct answer. There are no tricks and there is only one answer. It requires the cool application of logic to solve. And a lot of patience.Einstein's Riddle features fifty of the toughest logic problems, lateral thinking puzzles, and tests of mental agility. By turns entertaining and infuriating, the puzzles challenge our preconceptions, tell us about how we reason, and provide a rigorous intellectual workout.

What the Moon Saw


D.L. Koontz - 2018
    Libby finds herself thrust back in time to 1926, where danger and intrigue surround her. As Libby tries to adapt to her new life, she finds herself oddly drawn to the town sheriff who seems to know her far better than she knows herself. Yet he seems eerily familiar and as pieces of a past start surfacing in dreams and visions, Libby seeks out the handsome sheriff for answers, only to find more questions. As Libby learns someone is following her to change history, she must join forces with the sheriff to uncover the mystery of their past. Will they be thwarted by the master criminal who's determined to destroy them both or will they be able to build a life together after lifetimes of being pulled apart by nefarious forces?

Amusements in Mathematics


Henry Ernest Dudeney - 1917
    Intriguing, witty, paradoxical productions of one of the world's foremost creators of puzzles.This book was converted from its physical edition to the digital format by a community of volunteers. You may find it for free on the web. Purchase of the Kindle edition includes wireless delivery.

Brain teasers: 30 Interactive Brainteasers to Warm up your Brain (Brain teasers, riddles & puzzles, puzzles & games)


Puzzleland - 2015
     This book is specially formatted to provide clues, simply with a click, before providing the answer! You can ask for a clue before seeing the answer which is really great and makes the game a lot more fun! Download your Copy and start having fun right away!

Maze: Solve the World's Most Challenging Puzzle


Christopher Manson - 1985
    This is a building in the shape of a book...a maze. Each numbered page depicts a room in the maze. Tempted? Test your wits against mine. I guarantee that my maze will challenge you to think in ways you've never thought before. But beware. One wrong turn and you may never escape!

Summer Island


Natalie Normann - 2020
    He’s an outsider in the community that should have been his family, and now he’s setting foot on the strange land he has inherited for the first time.The welcome is a mix of distrust and strange gifts of food, especially from enigmatic Ninni Toft, his nearest neighbour, who has arrived for the season to get over a broken heart. Her wild spirit and irrepressible enthusiasm for the quirky locals are a heady brew for city-boy Jack, who is discovering the simple pleasures of island life – and what it means to belong. To a place. To a people. To one person in particular…Home is where the heart is, but is Jack’s heart with the career he left behind in London, or on the wind-swept shores of Summer Island, with Ninni?

Lose Your Breath


D.K. Hood - 2021
    Find out how he went from Black Ops to Black Rock Falls in this short 150-page read you won’t be able to put down. She pulls the door of her office closed and hurries over to her beaten-up old Toyota parked in a deserted alley. Slipping into the driver’s seat, she checks the rear-view mirror, and her heart stops. Staring back at her are the dark eyes of a stranger. She opens her mouth to scream, but it’s already too late…When secretary Annie Parkes is snatched from the street outside of her workplace, David Kane is tasked with finding her. Strong, highly skilled, and secretive, he’s a loner and an outsider; the only man the military trust to find Annie before her kidnappers make good on their promise to kill her.But as Kane pulls Annie from a derelict building, gunshots ringing through the deserted streets around them, he realizes rescuing her is just the beginning. He needs to keep her close to find out who is behind her capture, and to keep her safe.Hiding out in a remote part of town, Kane feels the walls he put up around himself many years ago begin to slip in front of Annie. Could she be more than just a job? With an old enemy hot on his tail, showing any weakness could be fatal—but when Annie is dragged back into danger once again, could he already be too late?

Outlaws of Sherwood Forest (Choose Your Own Adventure, #47)


Ellen Kushner - 1985
    Magically transported to Sherwood Forest, the reader must come to the aid of Robin Hood after the evil Sheriff of Nottingham captures Maid Marian.

Under the Italian Sun


Sue Moorcroft - 2021
    The rustle of vines. And the clink of wine glasses as the first cork of the evening is popped…Welcome to Italy. A place that holds the answer to Zia-Lucia Costa Chalmers’ many questions. Not least, how she ended up with such a mouthful of a name.When revelations close to home turn Zia’s world upside down,she realises the time has come to search out the Italian family she’s never known.But as she looks for answers, she can’t help but notice Piero, the vineyard owner next door – a distraction who may prove difficult to ignore…This summer, join Zia as she sets out to uncover her past. But can she find the future she’s always dreamed of along the way?The perfect summer read for fans of Katie Fforde and Carole Matthews.

Aha! Gotcha: Paradoxes to Puzzle & Delight (Tools for Transformation)


Martin Gardner - 1975
    A pocket book of riddles, full of fun and illustrations.

Bletchley Park Brainteasers


Sinclair McKay - 2017
    As well as approaching the country's finest mathematicians, they cast their nets much wider, interviewing sixth-form music students who could read orchestral scores, chess masters, poets, linguists, hieroglyphics experts and high society debutantes fresh from finishing school. To assess these individuals they devised various ingenious mind-twisters - hidden codes, cryptic crosswords, secret languages, complex riddles - and it is puzzles such as these, together with the fascinating recruitment stories that surround them, that make up the backbone of this book.The code breakers of Bletchley Park were united in their love of a good puzzle. If you feel the same, why not dive in, put your mental agility to the test and discover: Would Bletchley Park have recruited YOU?

The 100 Most Pointless Things in the World


Alexander Armstrong - 2012
    From the presenters of the hit BBC One TV show, Pointless, comes a collection of musings on some of the most pointless things, places and facts in everyday modern life.This book is the perfect blend of the obscure, the fascinating and the downright silly.