After the Railway Series was published, many Thomas & Friendsannuals were printed. They were hard-covered with colour pictures and photos throughout the book. The annuals also featured a number of exclusive characters. The 1979 and 1980 annuals did not contain any new material by the Rev. W. Awdry, but did have articles about real railways and railway terminology. The annuals published between 1984-1993 had stories written by Christopher Awdry. Starting in 2003, the stories were adapted from episodes of the television series.