I do recommend Asbestos House - The Secret History of James Hardy Industries, It gives you a good insight into what it must have been like working there. The author is Gideon Haigh.
If your into the maths/code-breaking stuff...I'd have to recommend Action This Day by Micheal Smith an Ralph Erskine.
Also a good read is The Mould in Dr Florey's Coat by Eric Lax. Its the story of the development of penicillin.
For more light hearted stuff, a brief history of nearly everything by Bill Bryson is pretty good, as is any of his other work.
Another good read is the bible, you can learn a lot from it and apply heaps to your everyday life, even if you aren't a Christian.
If you are actually interested in Christianity, I would recommend Mere Christianity By C.S. Lewis.