The Square Emerald vs The Vivero Letter: Which Should You Read?

Both live on shelves: Adventure, Thriller, Mystery, Fiction

Cover of The Square Emerald

The Square Emerald Edgar Wallace · 1926 ★★★★☆ 3.5 188 pages · ≈ 3 h 29 m · Challenging Find on Amazon

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Cover of The Vivero Letter

The Vivero Letter Desmond Bagley · 1968 ★★★★☆ 3.8 289 pages · ≈ 5 h 21 m · Moderate Find on Amazon

The verdict

Readers rate The Vivero Letter higher: 3.8 vs 3.5 from 853 votes.
The Vivero Letter is the easier read (Moderate), The Square Emerald more demanding (Challenging).

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