diff --git a/free-science-books.md b/free-science-books.md
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--- a/free-science-books.md
+++ b/free-science-books.md
@@ -88,6 +88,7 @@
 * [A Text Book for High School Students Studying Physics](http://ftp.igh.cnrs.fr/pub/nongnu//fhsst/Physics_Grade_10-12.pdf) - FHSST Authors (PDF)
 * [An introduction to Physics](http://eacpe.org/content/uploads/2014/01/PHYSICS-101.pdf) - Pervez Hoodbhoy (PDF)
 * [Atomic and Molecular Physics - Lecture Notes](http://www.yorku.ca/tomk/PHYS4011-W13.pdf) - Tom Kirchner (PDF)
+* [Behaviour of Electromagnetic Waves in Different Media and Structures](https://www.intechopen.com/books/415) - Ali Akdagli (PDF)
 * [Chaos: Classical and Quantum](http://chaosbook.org) - Predrag Cvitanović, Roberto Artuso, Ronnie Mainieri et al.
 * [Classical Dynamics](http://www.damtp.cam.ac.uk/user/tong/dynamics/clas.pdf) - David Tong (PDF)
 * [Classical Mechanics](http://www.physics.rutgers.edu/ugrad/494/bookr03D.pdf) - Joel A. Shapiro (PDF)