ðə fˈɜːst bˈʊk ɪnðə sˈɪɹiz, fˈɔːɹtɹəs ɪnðɪ ˈaɪ ʌv tˈaɪm, wʌz pˈʌblɪʃt ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈaɪv ænd fˈɑːloʊd baɪ fˈɔːɹtɹəs ʌv ˈiːɡəlz ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt, fˈɔːɹtɹəs ʌv ˈaʊlz ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn, fˈɔːɹtɹəs ʌv dɹˈæɡənz ɪn tˈuː θˈaʊzənd ænd fˈɔːɹtɹəs ʌv ˈaɪs ɪn tˈuː θˈaʊzənd sˈɪks.
The first book in the series, Fortress in the Eye of Time, was published in 1995 and followed by Fortress of Eagles in 1998, Fortress of Owls in 1999, Fortress of Dragons in 2000 and Fortress of Ice in 2006.