F.B. Pinion 
Thomas Hardy: His Life and Friends [PDF ebook] 

This biography contains new disclosures and interpretations of evidence, neglecting nothing significant in Hardy’s early years or his later life. It draws from innumerable sources, including all his published writings (not least the poems), biographies of him and of contemporaries, correspondence of friends and acquaintances, Emma Hardy’s diaries, and many unpublished letters from her and Florence Hardy, and brief background introductions indicate how some of Hardy’s friends influenced his career or enriched his life.