MONERGISM is offering some very handy titles on their website (not sure how long?).
They are 2 books by AW Pink:
'The Doctrine of Man's Impotence' and 'The Total Depravity of Man.'
These are available via HTML, ePub and .mobi formats and guess what? You do not have to register!
Monergism has also made available: 'Prevenient Grace and Semi-Pelagianism' (.pdf only) by Scott Christensen.
Great bedtime reading! Available HERE.