Eleven-year-old Ailey Benjamin Lane can dance - so he's certain that he'll land the role of the Scarecrow in his school's production of The Wiz.

Unfortunately, a talented classmate and a serious attack of nerves derail his audition: he just stands there, frozen.

Deflated and defeated, Ailey confides in his Grampa that he's ready to quit.

But Grampa believes in Ailey and, to encourage him, shares a childhood story.

As a boy, Grampa dreamed of becoming a tap dancer; he was so good that the Hollywood star and unofficial Mayor of Harlem, Bill 'Bojangles' Robinson, even gave him a special pair of tap shoes.

Curious, Ailey tries on the shoes - and instantly finds himself transported to 1930s Harlem.

There he meets a young street tapper and realises that it's his own grandfather!

Can Ailey help the 12-year-old version of Grampa face his fears? And, if Ailey changes the past, will he still be able to get home again?

Featuring an all-African-American cast of characters, and infused with references to black culture and history, this fantasy is sure to inspire readers.