Hello,
Further to Jan's recommendation I would add the following two books to the reading list, essential information to truly understand 1st century Christianity.
‘The Book Of Acts In Its First Century Setting’ by Richard Bauckham -
: http://shop.barnesandnoble.com/booksearch/isbnInquiry.asp?userid=0QXTW9C99C&mscssid=TQM1K2ED3X7X8PF7E4D89RQLJ3386TT1&isbn=1579105262
‘Jesus & The Rise Of Early Christianity’ by Paul Barnett
: http://shop.barnesandnoble.com/booksearch/isbnInquiry.asp?userid=0QXTW9C99C&mscssid=TQM1K2ED3X7X8PF7E4D89RQLJ3386TT1&isbn=0830815880
The Barnett book is written from a Biblical persepective rather than an historical one, but both together fill in many missing blanks.
Best regards - HS