- Haphazard Reality: Half a Century of Science
- Happy Birding
- Happy Cactus
- Happy City
- Happy Dog
- HAPPY HIPPO & BABBU BABOON
- Happy Kaninchen
- Happy Tails
- Happy-Go-Local
- Happycracy
- Haptic Visions
- HAR
- Harbo Syringe
- Hardrock Mining on Federal Lands
- Harley & Me
- Harlow Shapley: Biography of an Astronomer: The Man Who Measured the Universe
- Harmaghedon Universale
- Harminc nappal a világvége előtt
- Harmonia Macrocosmica
- Harmonia Macrocosmica
- Harmonic Analysis and the Theory of Probability
- Harmonic Analysis on Homogeneous Spaces
- Harmonic Proportion and Form in Nature, Art and Architecture
- Harmony
- Harmony and Unity: The Life of Niels Bohr
- Harnessing The Sun
- Harnessing the Sun’S Energy
- Harnessing Wetlands for Sustainable Livelihood
- Harpers Ferry National Historical Park
- Harriette and her Robot
- Harriman State Park
- Harvest the Wind
- Harvesting And Using Dandelions
- Harvesting Food Security
- Hasisadra's Adventure
- Haskell Design Patterns
- Hasta el final del tiempo
- Hasta el infinito y más allá
- Hastening the Maturity of the Grape
- Hat der Mensch noch eine Zukunft auf der Erde?
- Hatha yoga
- Haufenweise Lebensräume
- Haunted Data
- Haunting America
- Haustierpflege
- Hautkrankheiten bei Pferden
- Have I Really Solved Fermat's Last Theorem?
- Have Sum Fun 3
- Have You Ever Apologized to a Spider?
- Have Your Kale, Eat Pizza Too: A Carnivore's Guide to Eating More Plants
- Haven's Knight
- Hawai'i Volcanoes National Park
- Hawaiian Flowers
- Hawai‘i’s White Tern
- Hawking esencial