BG
For your youngest, from a magazine article about 'finding appropriate books for precocious readers':
"The Time Machine by H.G. Wells
For any fans of Doctor Who, this is a chance to read the adventures of the original time traveller.
The Hound of the Baskervilles by Arthur Conan Doyle
One of the master sleuth's most notorious cases - a gripping tale of detection set in the wilds of Dartmoor.
A Christmas Carol by Charles Dickens
The original, classic ghost story that's since been brought to life by the likes of the Muppets and Bill Murray.
Treasure Island by Robert Louis Stevenson
A timeless tale of adventure that will build pupils' reading stamina.
Alice's Adventures in Wonderland by Lewis Carroll
This extraordinarily strange tale is filled with inventive word play and humour.
His Dark Materials by Philip Pullman
A multi-award-winning trilogy that mixes fantasy, parallel worlds and weighty themes.
Hitler's Angel by William Osborne
For readers looking for high-octane thrills, this high-concept World War II-set story creates a blockbuster tale.
The Wolves of Willoughby Chase by Joan Aiken
A thrilling historical adventure from a masterful storyteller for confident readers with a taste for tales of the past.
Fly By Night by Frances Hardinge
The debut novel from an inspirational author; the polished craft of Hardinge's prose will enrich every reader's vocabulary
The Last Wild by Piers Torday
This first book in an award-winning trilogy is a real page-turner and a must-read for any fans of dystopias or readers concerned about environmental issues."
Hope this might help. Also recommended was The Underland Chronicles, a series for younger readers that Suzanne Collins wrote before she penned The Hunger Games, or Phoenix by S.F. Said, an epic space adventure about a boy who's searching for his father.