The last stand , Custer, Sitting Bull and the battle of the little big horn by Nathaniel Philbrick - ISBN 978-1-847-920009-6
Probably more than anyone needs to know about the Battle of the Little Bighorn and more.
One of the advantages of being a historian in this day and age is so much more information is available for you to study. Not just in different recollections but also in archeology. Hilbrick does an excellent job in weaving all this into a gripping narrative.
A large amount of coverage is given to the fights involving the other part the Seventh Calvary led by Bentine and Reno, where accounts by survivors give a greater certainty as to what took place.
Buildings that changed the world - Klaus Reichold and Bernhard Graf - ISBN 3-7913-1945-0
Pyramids, Great Wall of China, Windsor Castle, Macgu Picchu, Taj Mahal, Chartres Cathedral, you get the idea. I was rather sad that Persepolis was destroyed by Alexander the Great - it is said in revenge for the Persian destruction of the Acropolis in Athens.