For the best information about Leonard Weisgard visit the website his children created for him and his art. https://leonardweisgard.com/
Here I will share my collection of books – that he wrote and or illustrated.
Written and Illustrated by Leonard Weisgard
Suki, the Siamese Pussy, Thomas Nelson, 1937.

Jonathan Swift, Giullivers Travels , Nelson Doubleday 1954

Whose Little Bird Am I?, Crowell, 1944.

The Clean Pig, Scribner, 1952.

My First Picture Book, Grosset & Dunlap, 1953.

Silly Willy Nilly, Scribner, 1953.

Look & See , A First picture book, 1953 Putnam

The Most Beautiful Tree in the World, Wonder Books, 1956.

Treasures to See: A Museum Picture Book, Harcourt, 1956.

The Athenians in the Classical Period, Coward, 1963.

The First Farmers in the New Stone Age, Coward, 1966.

The Plymouth Thanksgiving, Doubleday, 1967.

The Beginnings of Cities: Recreation in Pictures and Text of Mesopotamian Life from Farming to Early City Buildings, Coward, 1968.

Illustrated 1946-1974
Clelia Delaeld, Mrs. Mallard’s Ducklings, Lothrop, 1946.

Alvin R. Tresselt, Rain Drop Splash, Lothrop, 1946.

Lewis Carroll, Alice’s Adventures in Wonderland [and] Through the Looking Glass, Harper, 1949.

Clement Clarke Moore, The Night before Christmas, Grosset & Dunlap, 1949.

Alvin R. Tresselt, The Little Lost Squirrel,Grosset & Dunlap, 1950.

Kathryn Jackson, Pantaloon,Simon & Schuster, 1951.

Kathryn Jackson, Wheels, Simon & Schuster, 1952.

Charlotte Zolotow, Indian, Indian,Simon & Schuster, 1952.

Evelyn Andreas, editor, The Big Treasure Book of Nursery Tales, Retold, Grosset & Dunlap, 1954.

Alice Dalgliesh, The Courage of Sarah Noble, Scribner, 1954

Beatrix Potter, Peter Rabbit, Grosset & Dunlap, 1955, revised edition, 1962.

Marjorie Kinnan Rawlings, Secret River, Scribner, 1955.

Miriam S. Potter, Mrs. Goose’s Green Trailer,Wonder Books, 1956.

Clyde Robert Bulla, The Valentine Cat, Crowell, 1959.

Sesyle Joslin, Brave Baby Elephant, Harcourt, 1960.

Sylvia Berger Redman, Do You Want to Hear a Secret?, Lothrop, 1960.

Bernice Frankel, Half-as-Big and the Tiger,F. Watts, 1961.

May Garelick, Where Does the Buttery Go When It Rains?, W. R. Scott, 1961.

Mary Le Duc O’Neill, Hailstones and Halibut Bones: Adventure in Color, Doubleday, 1961.

Aileen Fisher, Like Nothing at All, Crowell, 1962.

Sesyle Joslin, Baby Elephant and the Secret Wishes, Harcourt, 1962.

Sesyle Joslin, Senior Baby Elephant, the Pirate, Harcourt, 1962

Faith McNulty, When a Boy Wakes up in the Morning, Knopf, 1962.

Christopher Fry, The Boat That Mooed, Macmillan, 1965.

Clyde Robert Bulla, White Bird, Crowell, 1966.

Phyllis McGinley, A Wreath of Christmas Legends, Macmillan, 1967

May Garelick, Look at the Moon, W. R. Scott, 1969.

May Garelick, What Makes a Bird a Bird?, Follett, 1969.

Sandol S. Warburg, Growing Time, Houghton, 1969.

Rudyard Kipling, The Elephant’s Child, Walker & Co., 1970.

Rudyard Kipling, How the Leopard Got His Spots, Walker & Co., 1972.

Rudyard Kipling, How the Rhinoceros Got His Skin, Walker & Co., 1974.

By MWB & Illustrated by Leonard Weisgard
The Noisy Book, W. R. Scott, 1939.
Adapted The Comical Tragedy or Tragical Comedy of Punch and Judy, W. R. Scott, 1940.
The Country Noisy Book,W. R. Scott, 1940.
The Poodle and the Sheep, Dutton, 1941.
The Seashore Noisy Book, Harper, 1941, new edition, 1951.
The Golden Bunny and Seventeen Other Stories and Poems, Simon & Schuster, 1953.
Noon Balloon, Harper, 1952.
The Dark Wood of the Golden Birds, Harper, 1950.
The Quiet Noisy Book, Harper, 1950.
Pussy Willow, Simon & Schuster, 1951.
The Summer Noisy Book, Harper, 1951.
Little Frightened Tiger, Doubleday, 1953.
The Golden Egg Book,Simon & Schuster, 1947.
The Important Book,Harper, 1949.
The Important Book, Margaret Wise Brown, Harper, 1949
The Little Island, Doubleday, 1946.
The Indoor Noisy Book, Harper, 1942.
Night and Day, Harper, 1942.
Little Chicken, Harper, 1943.
The Noisy Bird Book, W. R. Scott, 1943
Big Dog, Little Dog, Doubleday, 1943.
Red Light, Green Light, Doubleday, 1944.
The City Noisy Book, W. R. Scott, 1946. (Not sure this actually exists – it’s on some lists- it’s not on Library of Congress )
The Golden Birthday Book, Western Publishing, 1989.