Book 2:The Renaissance, A Short History, by Paul Johnson
Good fast read to get a really broad view of the Renaissance. Gives the major facts and events of the artists and philosophers of the Renaissance era.
Book 3: The Roots of Romanticism by Isaiah Berlin
A compilation of lectures given by Isaiah Berlin just before he died about the Romantic Era. He was trying to write a book about the Romantic Era at the time, but died before he could finish it. Good overview of why the Romantic Era started.