There are some good Christian books to read for Lent that are all part of the free for download library of Saints' Books.
St. Thomas Aquinas - Meditations for Lent
Pope, St. Leo the Great, says that the thieves were crucified, one on
either side of him, so that in the very appearance of the scene of his
suffering there might be set forth that distinction which should be made
in the judgment of each one of us. St. Augustine has the same thought.
"The cross itself," he says, "was a tribunal. In the centre was the
judge. To the one side a man who believed and was set free, to the other
side a scoffer and he was condemned." Already there was made clear the
final fate of the living and the dead, the one class placed at his
right, the other on his left.'
Anonymous - Considerations and Devout Meditations for Every Day During the Holy Season of Lent
is nothing more united and less united than the soul and body. When one
advances, the other recoils; when one rises, the other descends; when
one is in health, the other is sick; when one is strong, the other is
weak. It is necessary, then, in order to strengthen and give health to
the soul, to bring the body under subjection, and weaken its evil
propensities by penance and mortification. I am not a man if I obey my
passions; I am not a Christian if I do not combat with and overcome my
passions; I am not a true penitent if I do not mortify my passions.
Since my body is polluted by sin, it ought to be purified by pain; and
since it has part in the pleasures of the soul, it ought to glory in
sharing its sorrows.'