I recommend "The First Year - Type 2 Diabetes" by Gretchen Becker published by Robinson, which I found very helpful when I was newly diagnosed and have often referred to since. It is humorous, straightforward and treats you like an intelligent human being who needs information in plain language. It is divided into sections (Day One, Day 2 etc up to Month 12) so you can read it "as you go", taking in information bit by bit, which is less overwhelming, or read it straight through or look up topics which particularly concern you.
I am very glad I came across it early on as I have since read some (in my opinion) extremely irritating and patronising books! I bought my copy from a large branch of WH Smith but your local public library should be able to get it for you.
Best wishes
MaryChristine