Wait, 'Hollywood Novel' feels more like a genre placeholder than a specific title I know. If we're talking about the quintessential Hollywood satire, I'd bet you're thinking of something like Bret Easton Ellis's 'Glamorama', but even that isn't 'the' Hollywood novel. The plot you're after probably follows a classic arc: a bright-eyed hopeful arrives in LA, gets chewed up by the industry's cynicism, experiences a meteoric rise fueled by shady deals or personal compromise, then faces a brutal downfall or a hollow victory. Think cocaine-fueled parties, soulless studio execs, and desperate screenwriters. Nathaniel West's 'The Day of the Locust' is the granddaddy of them all—it ends with a riot at a movie premiere, capturing the explosive, violent disappointment lurking under the glitter. If you want a modern take, 'The Seven Husbands of Evelyn Hugo' plays with that formula through a fictional old-Hollywood star's scandalous tell-all memoir.
Honestly, without a precise title, the main plot is essentially the corruption of the American Dream, refracted through the lens of the movie business. It's about the gap between the projected image and the grimy reality. You'll find this in books from F. Scott Fitzgerald's unfinished 'The Last Tycoon' to more recent stuff like 'City of Nets'. The protagonist usually starts wanting to create art but ends up wanting fame, or starts wanting fame and ends up with nothing. The setting itself—the parties, the pitches, the backlots—often becomes a character more vivid than any person in the story.