Books that take over 15 hours to read
A long haul: 2,750 books of 818 or more pages, most-read first. Bar height shows length.
It 21.4 h 
Harry Potter and the Order of the Phoenix 16.0 h 
The Summer I Turned Pretty Trilogy 15.6 h 
Bible 26.8 h 
The Lord of the Rings 22.0 h 
The Secret Language of Birthdays 15.3 h 
Fire & Blood 16.1 h 
Shatter Me Complete Collection 36.1 h 
Objective NCERT at Your FINGERTIPS for NEET-AIIMS - Biology 23.2 h 
The Stand 21.1 h 
The Brothers Karamazov 15.1 h 
Chemistry 20.5 h 
The Way of Kings 18.5 h 
The Bachman Books 16.5 h 
Microbiology 17.2 h 
11/22/63 15.6 h 
The Complete Sherlock Holmes 20.6 h 
Principles of Anatomy and Physiology 22.9 h 
Biology 23.1 h 
The Goldfinch 15.8 h 
The Pillars of the Earth 19.1 h 
Gone With the Wind 17.4 h 
Calculus 19.5 h 
Under the Dome 19.7 h 
Atlas Shrugged 20.3 h 
Anatomy 23.1 h 
Fundamentals of Physics 18.0 h 
Introduction to Algorithms 23.7 h 
Molecular Biology of the Cell 26.8 h 
Harry Potter (Series) 1-7 62.8 h 
Artificial Intelligence 21.0 h 
A Dance With Dragons 19.1 h 
A Storm of Swords 18.3 h 
The Witching Hour 17.7 h 
The Secret Language of Relationships 15.0 h 
Court of Thorns and Roses / A Court of Mist and Fury / A Court of Wings and Ruin / A Court of Frost and Starlight 26.4 h 
Physics for Scientists and Engineers 20.5 h 
Lonesome Dove 17.3 h 
The Rise and Fall of the Third Reich 22.9 h 
Campbell Biology 27.3 h 
Introductory Mathematical Analysis 15.6 h 
Shōgun 20.6 h 
The Wise Man’s Fear 18.5 h 
Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow 15.7 h 
Patternmaking for Fashion Design 15.0 h 
Software Engineering 15.4 h 
Human Anatomy & Physiology 20.9 h 
Words of Radiance 20.0 h 
Joy of Cooking 15.6 h 
Microbiology 16.8 h