The authors report the evaluation of the impact of a comic book about condom use distributed to Gabonese high school students in Libreville and Lambarene in 1999. This evaluation was conducted through a self-administered questionnaire completed by 954 students in 11 high schools immediately before distribution of a comic book about condoms and by 771 students 15-30 days afterwards. The anonymous questionnaire contained multiple-choice and open questions about knowledge, attitudes and practices. During the second survey (same schools and same classes), the questions tested knowledge about AIDS and about the stories in the book. The student populations who responded to the two questionnaires were homogeneous for sex, age, school class, and province of residence. Knowledge about the modes of HIV/AIDS contamination improved substantially between the two questionnaires, with knowledge about the mother-child transmission pathway increasing from 47% to 75% of responders. At the same time, and without any significant difference by sex, class or province, individual adhesion to the role of the condom as a means of prevention against AIDS progressed from 64% to 95%. The students questioned wanted AIDS prevention information to be better integrated into their curriculum and, in particular, they wanted educational activities in this area in their school, either by their teachers or in special information areas. Thus, the 48-page comic book by young Gabonese artists was perceived as a good method of condom education for the young (75%) and as an excellent method for inducing awareness about it among them (89%). The book's contents had been absorbed, and the students found that the stories and the message were well matched. Moreover, the extension of the readership beyond the initial distribution at the first evaluation (7.5 readers reported per copy) showed that the messages in the book spread well beyond the student group.