The Water of Life by John Bunyan and published by Classics.
John Bunyan writes "I have now presented thee with something of a discourse of the water of life and it's virtues; therefore, thou mayest, if thou wilt, call this book Bunyan's Bill of his Master's Water of Life. True, I have not set forth at large the excellent nature and quality thereof, nor can that so be done by the pen or tongue of men or angels.
Yet this I have said, and so saying, said truly, that whosoever shall drink of this water shall find it in him a well of water; and not only so, but a well springing up in him to everlasting life, let his disease be what it will. And as men, in their bills for conviction to readers, do give an account to the country of the persons cured, and the diseases that have been removed by liquors and preparations, they have made for that end, so could I, were it not already (by Holy Writ) done by an infallible pen to my hand, give you accounts of numberless numbers that have not only been made to live, but to live for ever, by drinking of this water, this pure water of life."
This book also includes an introduction by Charles Haddon Spurgeon.