This group of new books includes texts that are directed towards gaining a broad understanding of archaeology, such as introductory texts and books for children, books that examine issues across a planet-wide range of societies, and theoretical books building underpinnings for all archaeological research.
Introductions to Archaeology
Archaeological introductions are generally for specific classes or groups of people, and so they vary considerably in scope of coverage. Some are specific to a region or state; some are specifically for field work experience or obtaining theoretical background.

Death by Theory
Virtual Dig
The Archaeology Coursebook
The Past in Perspective
The Practical Archaeologist
First Peoples of the Northeast
Iowa's Archaeological Past
Theory of Archaeology
There isn't a really good way to number these kinds of books; each of the books listed below are all different and do what theoretical texts ought to do---tickle the brain in new ways.

Archaeological Theory and Scientific Practice
An Archaeology of the Soul
Archaeologies of the Contemporary Past
Fragmentation in Archaeology
Interpretations of Native North American Life
Archaeology Under Fire
Assessing Site Significance
Archaeological Studies of Gender in the Southeastern United States
The Archaeology of Difference
The Archaeology of Communities
Cross Cultural Studies
Many of the most interesting books published in archaeology today look at a broad sweep of ideas, how cultures change, how environment affects us, how different styles of the same thing are expressed across the world. Here are a handful of the most recent.

Archaeology of Rock Art
Floods, Famines, and Emperors
Human Impacts on Ancient Environments
The Mummy Congress
Archaeology and the Social History of Ships
Skywatchers
Children's Books
While I have yet to hear of very many children's books that are actually aimed at teaching archaeological methods or ethics, there have been a few published in the last couple of years.

Elena and the Coin
Explorers and Settlers of Spanish Texas
Ancient Greece
Ancient Rome
Ancient Egyptians: People of the Pyramids