First, I need to say: Dear hazcompat, please tell me you are kidding. Or made a mistake. Dom Crossan is a fallen away Catholic priest, now an atheist, who has spent his adult life trying to stomp out Christianity. To suggest his book on this forum seems especially wrong of you - why did you do it???
Here are some books I would suggest:
Rome and Jerusalem: The Clash of Ancient Civilizations - secular writer but gives a fair overview of the difference between Jewish and pagan civilizations
Memory and Manuscript with Tradition and Transmission in Early Christianity -famous book by a biblical scholar that began the collapse of a lot of theories by the ghastly Bultmann
Life in Biblical Israel by Philip J. King -general overview but scholarship is good
The Jewish World around the New Testament by Richard Bauckham Protestant scholar, so he gets some things wrong, but is basically good
In the Shadow of the Temple: Jewish Influences on Early Christianity
by Oskar Skarsaune -interesting book by a Jewish author that gives you a perspective that is enriching.
Jesus and the Gospels: An Introduction and Survey, Second Edition
by Craig L. Blomberg - another Protestant author, but he gives you an outline of the usual arguments about the gospels, and the arguments that refute them
The social message of the early church fathers by Igino Giordani - older book, but a Catholic perspective
Men & manners in the days of Christ;: Studies and character sketches of the first century,
by J. P Arendzen - this is a very, very old book -published in 1930 or so - but it is very good and gives a Catholic perspective
JUDAISM AND HELLENISM, by MARTIN HENGEL - Protestant scholar - this is a very famous book that examines the era just before the birth of Christ
Reading and Writing in the Time of Jesus by A. R. Millard - this book will give you confidence that the traditions and beliefs of the early church were passed on accurately
Hope you find some of these helpful, God bless, Annem