Okay, if you want the Jacqueline Susann ride, buckle up — I'm still giddy thinking about how compulsively readable these books are. First and foremost, read 'Valley of the Dolls' — it's the barometer for everything that made Susann famous: glamorous, trashy, tragic, and oddly honest about fame, addiction, and the cost of being a woman in show business. The characters can be larger-than-life and melodramatic, but that melodrama is the point; it reflects a culture obsessed with celebrity and quick fixes.
After that, I recommend 'The Love Machine' to see her satirical streak. It’s a little raspier, all about ambition and the mechanics of power in media, and it's surprisingly savage about how people manipulate each other to climb. Then move to 'Once Is Not Enough' — it's darker, more world-weary, and shows her range in tackling complicated family and sexual politics. Read them in publication order if you like watching an author sharpen her themes over time.
If you enjoy glossy 1960s-70s pop culture, Susann is essential reading for the guilty-pleasure shelf and for anyone curious about the roots of modern celebrity obsession. Bring a cup of tea or a cheeky cocktail, and let the melodrama carry you; you'll probably find a line or two that sticks with you for days.