J. R. (Baylor University, USA) LeMaster & E. Hudson Long 
The New Mark Twain Handbook [PDF ebook] 

This authors of this useful handbook, originally published in 1985, not only summarise Mark Twain scholarship, but also evaluate, in much detail, the various contributions. Each chapter includes a thorough annotated bibliography. This title also includes a comprehensive chronological table of the significant events in Mark Twain’s Life, including the publication dates of his works. This title will be of interest to students of American Literature.