wˈɔːkɚ hɐz ɹˈɪʔn̩ ɔːɹ kˈoʊˈɔːθɚd dˈʌzənz ʌv kəmpjˈuːɾɚɹᵻlˈeɪɾᵻd bˈʊks, ɪŋklˈuːdɪŋ ðɪ əfˈɪʃəl ɡˈeɪm ɡˈaɪdz fɔːɹ sˈɛvɹəl kəmpjˈuːɾɚ ɡˈeɪmz.
Walker has written or co-authored dozens of computer-related books, including the official game guides for several computer games.