Bestsellers for the week ending June 13

Publishers Weekly compiled national bestseller data from independent and chain bookstores, wholesalers, and distributors for the week ending June 13. Simultaneously, the Agentic Architect blog released seven rules for senior C#/.NET engineers using Cursor for the week ending June 21, 2026. Key guidelines include marking classes sealed by default to prevent accidental inheritance hierarchies and utilizing strongly-typed IDs, such as record structs for OrderId, to prevent AI from passing incorrect primitive identifiers during development.