A Free E-book by Benjamin Keach with an introduction by Dr. Jim Renihan from the Confessingbaptist:

http://confessingbaptist.com/free-e-book-friday-the-travels-of-true-godliness-by-hercules-collins-intro-by-dr-renihan/

here is the link to the book in case you are having trouble getting the link to work:

https://play.google.com/store/books/details?id=QIENAAAAYAAJ&rdid=book-QIENAAAAYAAJ&rdot=1