ˌælɪɡzˈændɚɹ ɪz ðɪ ˈɔːθɚɹ əvə bˈʊk ɛntˈaɪɾəld dˈɑːɹk dəmˈɪniən, ɪnwˌɪtʃ hiː ɛksplˈoːɹd ðɪ aɪdˈiə ðæt ɐnˈʌðɚ wˈɜːld ˈɑːkjʊpˌaɪd ðə sˈeɪm spˈeɪstaɪm æz ˌaʊɚɹ ˈoʊn.
Alexander is the author of a book entitled Dark Dominion, in which he explored the idea that another world occupied the same spacetime as our own.