Bibles can be purchased at any well-stocked book store like Barnes & Noble.
Christian supply stores are another source and can be found listed in the Yellow Pages along with regular types of book stores.
Thrift stores like Good Will and Salvation Army usually have some inexpensive, second hand Bibles on their shelves.
Please do yourself a favor by using one that reads very close to our own modern way of speaking. Rickety old antiques like the Douay-Rheims, the Confraternity, the American Standard Version, and the King James version are no longer practical because their language and grammar are obsolete.
Select a contemporary version in common use like the New International (NIV), New American Bible (NAB), Revised Standard (RSV), the New American Standard (NAS), the English Standard (ESV) and/or the New Living (NLT).
» I should give you a heads-up that no matter which version of the Bible you select to read, somebody is going to come along and criticize your choice; so be ready for that.
The Bible can be a tedious bore for people new to it; so I highly recommend testing the waters by beginning with the books of Ruth and Esther. The stories are pretty good, and relatively short.
If those two books fail to discourage you, then I suggest moving on to Genesis for your third. Lots of really good stuff is in there: the origin of the cosmos-- all life, matter, and energy --Adam and Eve, Cain and Abel, Noah and the Flood, the Tower of Babel, Abraham, Sarah, Isaac and Ishmael, Rebecca, Jacob, Rachel, and Joseph's reunion with his brothers.
When my teen-age son first started reading Genesis, he became very discouraged. When I asked him what the matter was, he said he couldn’t figure out the hidden messages. So I told him: Son, forget about hidden messages. Just read the Bible like a novel or an encyclopedia and you’ll get a lot more out of it that way; and he did.
NOTE: The information contained in this particular post isn't intended to counsel scholars and/or seminary students: it's to advise the mildly curious rather than the deadly serious.