Although the personal contact between the two was limited, Marx read Proudhon's writings at this time, discussions of which may be found in his work of the period, including the book written against Bruno Bauer, The Holy Family (1845), and the unpublished Economic and Philosophic Manuscripts of 1844.[6] In the published book Marx lent critical support to some of the ideas of Proudhon against competing ideas of Bauer.[6]