Books about Human-alien encounters -- Fiction (sorted alphabetically)
- Half past Alligator Donald Colvin
- Hand Jerry Sohl
- Harwood's Vortex Robert Silverberg
- Heel Philip José Farmer
- hellflower George O. Smith
- Hellflower George O. Smith
- Helpfully Yours Evelyn E. Smith
- Hero Elaine Wilber
- "Hey Ma, Where's Willie?" I. M. Bukstein
- high ones Poul Anderson
- Hitch Hikers Vernon L. McCain
- Homecoming Horde Robert Silverberg
- Home is the Spaceman George O. Smith
- Honeymoon in bedlam Nelson S. Bond
- Hop O' My Thumb Joseph Samachson
- Huddlers William Campbell Gault
- If You Was a Moklin Murray Leinster
- Ignoble Savages Evelyn E. Smith
- I'll See You in My Dreams William Campbell Gault
- Incident on Route 12 James H. Schmitz
- Inhabited Richard Wilson
- Inside John Barth William W. Stuart
- Invader From Infinity George A. Whittington
- Invaders Murray Leinster
- invading asteroid Manly Wade Wellman