Are engineered-wood bookcases sturdy enough for a full load of books?

Verified-purchase reviewers consistently note that particle-board and laminate bookcases hold up fine for books when assembled correctly and anchored to the wall, but sagging on wide unsupported spans and stripped cam-lock hardware are the recurring complaints. For heavy book loads, reviewers favor units with shorter shelf spans, metal frames, or center supports, and nearly all stress using the included anti-tip kit.