If you're looking for a gift for a loved one (or is that for yourself?), you might be interested in these boxed sets. They're usually nicely illustrated and will provide plenty of reading.
Stephen King's
Dark Tower
includes the first three volumes in the series, to be completed with
Wizard and Glass.
Beware whom you want to offer it since it's considered grim horror/fantasy.
The same goes for Anne Rice's
Complete Vampire
Chronicles (which are not really complete since there are now two more books).
C. S. Lewis'
Chronicles of Narnia, Suzan Cooper's
The Dark is Rising and
J.R.R. Tolkien's
Lord of the Rings
are perfect classics to introduce children to quality fantasy. Though older,
Alice's Adventures
in Wonderland by Lewis Carroll still remains a major reference in the field of speculative fiction.
More recent series packed into a box are Terry Goodking's
Sword
of Truth and Robert Jordan's Wheel
of Time.