Check this topic out - https://www.researchgate.net/post/Can_anyone_suggest_a_source_related_to_X-Ray?cp=re65_x_p3&ch=reg&loginT=mlwYhDAFzdE-CvMvAqUpXUOUJM1QfX2cK9loqawB74I%2C&pli=1#view=52c32f17d4c118c9688b45c7

some of the best book in the field on X-ray Crystallography are:

1. Elements of X-ray Diffraction- by B D Cullity

2. FUNDAMENTALS OF POWDER DIFFRACTION AND STRUCTURAL CHARACTERIZATION OF MATERIALS by Vitalij K. PecharSky

3. Two_Dimensional_X_Ray_Diffraction by Bob B. He

4. X-ray Scattering and Atomic Structure by E. O. Wollan

5. "The Basics of Crystallography and Diffraction" by "Christopher Hammond"

What to choose depends on what your level is and what you aim at. I agree with Julio: you can't simply open "any" book. Those suggested by Syed for instance are books on powder diffraction (for inorganics/small molecules) and the crystallographic part they contain is biased towards that.

You will definitely need something containing the basics of symmetry and then some diffraction (the book of Rupp could be good). It will be single crystal diffraction as the stuff you find in powder diffraction applied to proteins is still scarce

Thank you everyone for the feedback. I am starting my rotation in a structural biology lab. I hope the book by Rupp is simpler to get me a start, considering I am a biology student.

The books above are all good. I found crystallography made crystal clear by g Rhodes very useful when I was an undergraduate.

I think the best is

"The Basics of Crystallography and Diffraction" by "Christopher Hammond"

For beginners in protein X-ray crystallography a very good book could be : "Principles of Protein X-Ray Crystallography" by Jan Drenth (Springer). It will give you good general view of almost all the different subjects in protein crystallography and very good bases to continue deeper.

Highly appreciated. Thank you.

"Crystallography Made crystal clear" i found it best for self teach regarding crystallography. no need to bother about mathematics as even basic principles are presented. For understanding crystallization best book is "Introduction to Macromolecular crystallography by Alexendar".

If you want to know the essentials (you are novince or  just starting)... look for McPherson "introduction to macromolecular crystallography". 

Very good basic introduction: http://ukcatalogue.oup.com/product/9780199219476.do

(I had older edition also)

with more mathematics: http://ukcatalogue.oup.com/product/9780199219667.doeven lighter than Clegg: http://ukcatalogue.oup.com/product/9780199576357.do

newest edition of Giacovazzo: http://ukcatalogue.oup.com/product/9780199573660.do

in opposition to some others I think Hammond is a waste of paper, it is only about basic geometrical concepts of diffraction...

Biomolecular Crystallography from Bernhard Rupp. Here is the link http://www.ruppweb.org/Garland/default.htm

http://www.ruppweb.org/Garland/default.htm

X-Ray Diffraction Crystallography: Introduction, Examples and Solved Problems

By Y Waseda et al. (Springer, 2011)

https://www.springer.com/us/book/9783642166341