Hi,
Just a couple of ideas you might enjoy;
Gavin Menzies' "1421 The Year China Discovered the World" - a chunky read, but then the world is a lot to discover;)
Also
Robert Hughes' "The Fatal Shore" about convicts sent to Australia in the 18th/19th century
Giles Milton's "Big Chief Elizabeth"
& I would also have said the Dava Sobel book that's already been mentioned.
Enjoy!