How About Some Examples?

Here are some books and series that fit the genre really well, even if they weren’t all written with “dreampunk” in mind. I’ve tried to select works that deal in some way with the internal/
The Alice stories (1865–1872) by Lewis Carroll

The Dreaming Jewels (1950) by Theodore Sturgeon

Solaris (1961) by Stanisław Lem

The Three Stigmata of Palmer Eldritch (1965) by Philip K. Dick

The Dream Master (1966) by Roger Zelazny

Ubik (1969) by Philip K. Dick

The Chronicles of Amber (1970–1991) by Roger Zelazny

The Lathe of Heaven (1971) by Ursula K. Le Guin

Up the Walls of the World (1978) by James Tiptree Jr.

White Light (1980) by Rudy Rucker

The Dark Tower series (1982–2004) by Stephen King

Hard-Boiled Wonderland and the End of the World (1985) by Haruki Murakami

The Sandman series (1989–1996) by Neil Gaiman

Snow Crash (1992) by Neal Stephenson

The Vurt series (1993–1997) by Jeff Noon

The Newford series (1993–2004) by Charles de Lint

Fight Club (1996) by Chuck Palahniuk

Neverwhere (1996) by Neil Gaiman

Perdido Street Station (2000) by China Miéville

The Kefahuchi Tract trilogy (2002–2012) by M. John Harrison

The Circle series (2003–2009) by Ted Dekker

The Scott Pilgrim series (2004–2010) by Bryan Lee O'Malley

A Monster Calls (2011) by Patrick Ness

The Darkening of the Light (2012) by Tessa B. Dick

The Diviners series (2012–2020) by Libba Bray

Hoodoo (2016) by Ronald L. Smith

Letters to the Black Underground (2016) by Yelena Calavera

Jerusalem (2016) by Alan Moore

Storm Dreams (2016) by Jeb R. Sherrill

The Roam series (2016–2017) by Dez Schwartz

The Strange the Dreamer series (2017–2018) by Laini Taylor

The Soul Sleep Cycle (2017–2019) by David Michael Williams

Urban Gothic (2019) by Stephen Coghlan

The Gay Wizard series (2019–) by V. S. Santoni

Mirrormaze: A Dreampunk Anthology (2020) edited by Cliff Jones Jr.

Next: Dreampunk in Film