Two very useful old books are available online through Google Books.
The first is Sir Edward Maunde Thompson’s Handbook of Greek and Latin Palaeography. If ancient manuscripts fascinate you, then this book will likely do the same.
The second is A. H. Strong’s Systematic Theology, volumes 1 and 2. I looked, and it doesn’t seem that Google Books has the third volume of his Systematic, but vols. 1 and 2 are certainly nice to have. His chapter on inspiration and (lack of) inerrancy in Scripture is well worth reading.