It had cost Adam a great deal of trouble and work in overhours to know what he knew over and above the secrets of his handicraft, and that acquaintance with mechanics and figures, and the nature of the materials he worked with, which was made easy to him by inborn inherited faculty—to get the mastery of his pen, and write a plain hand, to spell without any other mistakes than must in fairness be attributed to the unreasonable character of orthography rather than to any deficiency in the speller, and, moreover, to learn his musical notes and part-singing. Besides all this, he had read his Bible, including the apocryphal books; Poor Richard's Almanac, Taylor's Holy Living and Dying, The Pilgrim's Progress, with Bunyan's Life and Holy War, a great deal of Bailey's Dictionary, Valentine and Orson, and part of a History of Babylon, which Bartle Massey had lent him. He might have had many more books from Bartle Massey, but he had no time for reading "the commin print," as Lisbeth called it, so busy as he was with figures in all the leisure moments which he did not fill up with extra carpentry. (19.8)
Here, Eliot's narrator gives a survey of Adam's education. Adam gravitates to practical writings (Poor Richard's Almanac) and religious treatises. His learning has a strong element of self-improvement, and his scholarly pursuits have helped to cultivate his spirit of hard work and constant endeavor. Nowadays, a guy like Adam would have a whole shelf full of those Idiot's Guides in his bedroom.