I designed and made a slanted bookshelf for my new place with steel piping from scratch : r/DIY
allen + roth Java Wood 5-Shelf Ladder Bookcase (26.75-in W x 72.62-in H x 16.25-in D) in the Bookcases department at Lowes.com
Amazon.com: Lavish Home 5-Tier Ladder Bookshelf- Leaning Decorative Shelves for Display, Walnut : Home & Kitchen
Zipcode Design™ Faircloth 50'' H x 15.7'' W 9-Tier Etagere Bookshelf & Reviews | Wayfair
Office at Home Open Modern Industrial, Tall, Slanted, Ladder Shelf Organic Media Bookshelf, Trestle Bookcase, Libreros de Madera - Bed Bath & Beyond - 24229529