From Amazon.co.uk:
'The air about him became hot, his eyes squeezed shut, and he felt his heart drop suddenly as though he were speeding down the rails on a big dipper. He had no time to scream.'

Leo realises in dramatic fashion that he has an ability-an extraordinary ability which gives him the power to take part in his family's past and shape history itself. Who is the mysterious old man whose shop he stumbles into and who later turns up at his birthday party? The boys he bumps into flying their strange model aeroplanes? The girl he finds wandering the streets of London, but a London he doesn't recognise? As Leo begins to fill in the gaps of his family tree, he is drawn into some of the most interesting, exciting and dangerous events of the past 150 years where is actually able to say 'I was there'! But finally he must solve the terrifying mystery surrounding the disappearance of his great-great-grandfather Jasper, the inventor who vanished into thin air.

Bought at the Penrith City Library book sale.

Left at the Street Library.

Release #32 for the 2018 What's in a Name? Challenge.