So far my personal Heinlein collection consists of the following (in no particular order):
The Star Beast
Farnham's Freehold
Glory Road
The Puppet Masters
Between Planets
The Worlds of Robert Heinlein (short stories: Free Men, Blowups Happen, Searchlight, Life-line, Solution Unsatisfactory)
The Rolling Stones (concept for Star Trek's "tribbles" shamelessly ripped off from this story)
Friday
Tunnel in the Sky (always wondered if the "stobor" mentioned in the story was just "robots" spelled backwards??)
Space Cadet
Waldo & Magic, Inc.
Citizen of the Galaxy
Time for the Stars
Starship Troopers
Time Enough for Love
Expanded Universe
Revolt in 2100
I Will Fear No Evil
Methuselah's Children
The Menace From Earth
Podkayne of Mars
6 X H (short stories: The Unpleasant Profession of Jonathan Hoag, The Man Who Traveled in Elephants, "All You Zombies", They, Our Fair City, "And He Built a Crooked House")
Red Planet
Assignment in Eternity (short stories: Gulf, Elsewhen, Lost Legacy, Jerry Was A Man)
Stranger in a Strange Land
To Sail Beyond the Sunset
Farmer in the Sky
Job: A Comedy of Justice
The Moon is a Harsh Mistress
Orphans of the Sky
The Number of the Beast
The Man Who Sold the Moon
Starman Jones
Rocket Ship Galileo
So not quite a complete collection yet, but it gives me something to do when I have a chance to prowl around used book stores. I take my list with me and if I find something by Heinlein that I don't already have, I nab it.
I toyed with leaving it to one of the colleges of which I was an alum, but with the mental powers of the yutes I see about today, I am much happier with the heavy cash it brought in to fund my poor efforts at feeding crappie and red snapper...