A 157 page .pdf copy of Who's Who & What's What in the Books of Dr. Seuss is available as a free download from the Dartmouth College web site.

The following is a chronological list of Dr. Seuss Books
with links to Amazon Descriptions of those books:

And To Think That I Saw It On Mulberry Street (1938)	The 500 Hats of Bartholomew Cubbins (1938)	Seven Lady Godivas : The True Facts Concerning History's Barest Family (1939)	The King's Stilts (1939)
Horton Hatches the Egg (1940)	McElligot's Pool (1947)	Thidwick the Big-Hearted Moose (1948)	Bartholomew and the Oobleck (1959) Caldecott Honor Book
If I Ran the Zoo (1950)	Scrambled Eggs Super (1953)	Horton Hears a Who! (1954)	On Beyond Zebra! (1954)
If I Ran the Circus (1956)	The Cat in the Hat (1957)	How the Grinch Stole Christmas! (1957)	Yertle the Turtle and Other Stories (1958)
The Cat in the Hat Comes Back (1958)	Happy Birthday to You! (1959)	Green Eggs and Ham (1960)	One Fish Two Fish Red Fish Blue Fish (1960)
The Sneetches and Other Stories (1961)	Dr. Seuss's Sleep Book (1962)	Dr. Seuss's ABC (1963)	Hop on Pop (1963)
Fox in Socks (1965)	I Had Trouble in Getting to Solla Sollew (1965)	The Cat in the Hat Songbook (1967)	The Foot Book (1968)
I Can Lick 30 Tigers Today! and Other Stories (1969)	My Book About Me (1969)	I Can Draw It Myself (1970)	Mr Brown Can Moo! Can You? (1970)
The Lorax (1971)	Marviin K. Mooney Will You Please Go Now! (1972)	Did I Ever Tell You How Lucky You are? (1973)	The Shape of Me and Other Stuff (1973)
Great Day for Up (1974)	There's a Wocket in My Pocket (1974)	Oh, The Thinks You Can Think! (1975)	The Cat's Quizzer (1976)
I Can Read With My Eyes Shut! (1978)	Oh Say Can You Say? (1979)	Hunches in Bunches (1982)	The Butter Battle Book (1984) New York Times Notable Book of the Year
You're Only Old Once! A Book for Obsolete Children (1986)	I am Not Going to Get Up Today! (1987)	Oh the Places You'll Go! (1990)	Daisy-Head Mayzie (1994) (posthumously)
	My Many Colored Days (1996) (posthumously)	Horray for Diffendoofer Day! (1998) (posthumously)