Martin Ruef | Authors | 2manybooks

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© 2026 2manybooks. All rights reserved. All book values provided are estimates only and are intended for general informational purposes. Such values may vary based on market conditions, item condition, provenance, and other factors, and should not be relied upon as definitive or current valuations. No representation or warranty, express or implied, is made regarding the accuracy or completeness of these estimates. For an accurate, current, and authoritative valuation, users should consult a qualified professional appraiser.

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Martin Ruef | Authors | 2manybooks