>>796176
CS Lewis gets another one! He is very brilliant in his own quiet way, so his work, especially that book, is very enduring.
Have this public domain book by St. Paul of the Cross, the Passionist founder. I'm not Catholic, but Nihil Obstat books (i.e. those that pass their censor) are never bad. This book has been a continuing source of good advice for me personally so I hope you find it so.
Also, another thing; you don't need so many books. Spirituality isn't a book-learning kind of thing, but a personal experience kind of thing. It's good to have the advice of one or two masters, but it's not useful to have enough of them to go wandering seeking contradictory teachings. It's just a snare that comes with the kind of obedience and discipline that spirituality attempts to cultivate, besides, the spiritual writers themselves would downplay their differences when it comes to ascetic practices.