Free and reduced ebook lunches (nonfiction)

How to Give a TED Talk 
(2-in-1 set): 
Complete Guide on how to Create and Deliver a TED Talk 
Akash Karia 
Free

Hidden In Plain Sight: 
The simple link between relativity and quantum mechanics 
Andrew Thomas 
$0.99

Hidden In Plain Sight 2: 
The equation of the universe 
Andrew Thomas 
$0.99

How To Diagnose Your Character: 
Using Psychology To Create an In-Depth Character 
Joshua Hoyt 
$0.99

50 Genetics Ideas You Really Need to Know 
Mark Henderson 
$1.39

Periodic Tales: 
A Cultural History of the Elements, from Arsenic to Zinc 
Hugh Aldersey-Williams 
$1.99

Great Formulas Explained
Physics, Mathematics, Economics 
Metin Bektas 
$2.99

More Great Formulas Explained 
Metin Bektas 
$2.99

A Most Incomprehensible Thing: 
Notes Towards a Very Gentle Introduction to the Mathematics of Relativity 
Peter Collier 
$3.30