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From the publisher:

We offer the pious reader a new edition of the Psalter, which is intended to serve for cell (private) prayer.

A special feature of this edition is the commentary on the titles of the psalms, which, although not part of the inspired text, are nevertheless an ancient addition to the Book of Psalms that may indicate historical circumstances (A psalm of David when he was fleeing from Absalom), literary genre (i>prayer), authorship (i>David, Asaph), and other additional information about the psalms.