This famous book was written by James Allen (November 28, 1864 1912), who was a British philosophical writer known for his inspirational books and poetry and as a pioneer of the self-help movement.
This book has been mass-produced since its publication in 1902.
At present it is a public domain book has got published by many good publishers and available in e-book form also.
For in depth understanding you may get a copy from maret / internet, however this review (which you are reading right now) is not available at any other place.