Laughing Space
- Houghton Mifflin (Anthologie), 1982, 520 pages avec J.O. Jeppson

Lavender Skywriter
- Economy (Oklahoma city) (Anthologie) de Thedore I. Harris & Mildrer Creekman & Margaret H. Greenman & Louise Matteoni

Le Meraviglie
- (Anthologie), 1959 de Sergio Solmi & Carlo Fruttero

Lecherous Limericks
- Fawcett Crest, May-76, 208 pages
- Walker, 1975, 87 pages
- Walker, 1975, 96 pages

Life And Energy
- Doubleday, 1962, 380 pages
- Bantam/Pathfinder, 1965, 378 pages
- Avon/Discus, 1972
- Avon, Jan-72, 365 pages

Life And Time
- Avon/Discus, Dec-79, 272 pages
- Doubleday, 1978, 273 pages

Light
- Follet, 1970, 30 pages

Limericks : Too Gross; Or Two Dozen Dirty Stanzas
- W. W. Norton, 1985, 101 pages
- W. W. Norton, 1978, 101 pages

Little Brothers
- Pretentious Press, 1988

Little Treasury Of Dinosaurs
- Chatham River Press, 1989

Little Treasury Of Dinosaurs : Armored Dinosaurs
- Chatham River Press, 1989

Little Treasury Of Dinosaurs : Giant Dinosaurs
- Chatham River Press, 1989

Little Treasury Of Dinosaurs : Meat-Eating Dinosaurs and Horned Dinosaurs
- Chatham River Press, 1989

Little Treasury Of Dinosaurs : Sea Reptiles And Flying Reptiles
- Chatham River Press, 1989

Little Treasury Of Dinosaurs : Small Dinosaurs
- Chatham River Press, 1989

Living In The Future
- Beaufort Books, 1985, 288 pages

Looking Forward
- Beechhurst (Anthologie), 1953 de Milton A. Lesser

Lucky Starr And The Big Sun Of Mercury
- Fawcett Crest (Roman), 1978
- Doubleday (Roman), 1956, 191 pages
- Twayne Pub. (Roman), 1978, 191 pages
- NAL/Signet (Roman), Mar-72, 143 pages
- Ballantine/Del Rey (Roman), Feb-84, 174 pages
- NAL/Signet (Roman), 1972, 174 pages

Lucky Starr And The Moons Of Jupiter
- Bantam/Spectra (Roman), Jun-93, 306 pages
- Doubleday (Roman), 1957, 192 pages
- NAL/Signet (Roman), May-72, 142 pages
- Twayne Pub. (Roman), 1978, 192 pages
- Fawcett Crest (Roman), 1978
- Fawcett Crest (Roman), 1978

Lucky Starr And The Oceans Of Venus
- NAL/Signet (Roman), Mar-72, 142 pages
- Doubleday (Roman), 1954, 186 pages
- Fawcett Crest (Roman), 1978
- Twayne Pub. (Roman), 1978, 186 pages

Lucky Starr And The Oceans Of Venus / Lucky Starr And The Big Sun Of Mercury
- Bantam/Spectra (Roman), May-93, 307 pages

Lucky Starr And The Pirates Of The Asteroids
- Fawcett Crest (Roman), 175 pages
- NAL/Signet (Roman), Dec-71, 144 pages
- NAL/Signet (Roman), Dec-71, 144 pages
- Doubleday (Roman), 1953, 188 pages
- Ballantine/Del Rey (Roman), 1979
- Twayne Pub. (Roman), 1978, 188 pages

Lucky Starr And The Rings Of Saturn
- Fawcett Crest (Roman), 1978
- Twayne Pub. (Roman), 1978, 191 pages
- Ballantine/Del Rey (Roman), 1984
- NAL/Signet (Roman), May-72, 144 pages
- Doubleday (Roman), 1958, 179 pages

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