The demands on the adult literacy-rate are very high in Sweden. People with reading and writing difficulties may find it hard to fit into the community and to succeed in school. To accommodate the needs of students with learning disabilities, Swedish schools provide easy-to-understand materials. The purpose of my thesis is to examine how easy-to-read textbooks for high school students are different from regular textbooks. The study was carried out using a content analysis and I examined the books according to criteria specified by the Swedish author Torbjörn Lundgren. The results showed that the adapted books do not follow the requirements for easy-to-read literature. However, there is a big difference between the easy-to-read textbooks and the regular textbooks. The easy-to-read books have been simplified and the content is explained in complete detail. There is also a big difference between the two adapted books that I examined. They seem to be based on different easy-to-read criteria.