I got mine free in a church-library give-away. Try your used book store!
DeWohl’s books are historically rich and theologically inspiring.
I always hit the book fairs and used book stores first. Our used book store lets us turn in a book we have read (without our name written in it) and get credits on the next book we purchase.
I had never read The Screwtape Letters and am currently reading it.
My next book is about the Blessed Virgin Marys appearance in Africa by Imaculeee Illabagiza. Our Lady of Kibeho — I think is in the title.