The Goodnow Library is offering residents help on using e-books such as Kindles and Nooks. The next classes will be held from 6:30 to 8:30 p.m. Aug. 20 and from 2 to 4 p.m. Aug. 21.  The library has about 40,000 electronic titles available for lending. Matt Amory, computer specialist and reference librarian, will demonstrate the e-reader services available at the library and answer questions from patrons.