Today's free book is With Sa'di in the garden: or, The book of love, being the "Ishk" or third chapter of the "Bostân" of the Persian poet Sa'di by Edwin Arnold (1906). For the table of contents, check at the bottom of this post below the image. You can read about Sadi's Bustan at Wikipedia.
The book is available to read online at Hathi Trust (I have not checked other online sources).