In an endeavor that has taken longer than I will ever admit to, I've tracked down videos of all 8 Book of Cosmogony entries in both English and Japanese. I will put the links below along with the titles of each entry in both languages (including a direct translation of the Japanese titles), where to find the books in the game, and the time in each video you'll want to go to in order to see them.
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—The Hexatheon—
創星記 六神の章 ("Cosmogony, Chapter of the Six Gods")
-On a seat at Galdin Quay
https://www.youtube.com/watch?v=WldC4Aa0jz8 (video is only 15 seconds long; timestamp unnecessary)
https://www.youtube.com/watch?v=0UVCMK1jDSM (26:25)
—The Oracle—
創星記 神凪の章 ("Cosmogony, Chapter of the Oracle")
-On a bench at the Wiz Chocobo Post
https://www.youtube.com/watch?v=rYAIAyenYk0 (from start of video)
https://www.youtube.com/watch?v=ORg7vyrz-wU (2:00)
—The Revelation—
創星記解説 啓示 ("Annotations to the Cosmogony, Revelation")
-On a supply cart outside at the Meldacio Hunter HQ
https://www.youtube.com/watch?v=to4vK00h6t4 (1:30)
https://www.youtube.com/watch?v=_vGsZB9z088 (27:50)
—The Hexatheon and Their Divine Host—
創星記解説 六神二十四使の章 ("Annotations to the Cosmogony, Chapter of the Six Gods' Twenty Four Messengers")
-On a table outside the motel at Taelpar
http://www.youtube.com/watch?v=0JkHF2tXAy8 (0:10)
https://www.youtube.com/watch?v=h4tnYaDp8m8 (34:45)
—The Covenant—
創星記解説 誓約 ("Annotations to the Cosmogony, Covenant")
-On a table outside the Leville in Lestallum
https://www.youtube.com/watch?v=EbeQrb7HShU (0:06)
https://www.youtube.com/watch?v=dKhtsz2EG4U (1:45)
—15:2, "Nadir"—
創星記原本 十五章 序の二より抜粋 ("Extract from original copy of the Cosmogony, Chapter 15, Verse 2")
-On some stacked cable spools in the basement of the lighthouse at Cape Caem
https://www.youtube.com/watch?v=p-2JOzjKSR8 (5:30)
https://www.youtube.com/watch?v=jfR11L4bDjc (5:13)
—The Crystal—
創星記 聖石の章 ("Cosmogony, Chapter of the Holy Stone")
-On the bar at Maagho's in Altissia
https://www.youtube.com/watch?v=dq3ubCCIjQA (12:15)
https://www.youtube.com/watch?v=wUnoNj_3TMc (23:48)
—The Ring—
創星記 指輪の章 ("Cosmogony, Chapter of the Ring")
-On a bench at the train station in Tenebrae
https://www.youtube.com/watch?v=WLtdQ_vVZs8 (5:50)
https://www.youtube.com/watch?v=ZE2SdB9Wex0 (33:45)
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I'll probably take screenshots tomorrow for good measure.
EDIT: I should add, by the way, that 創星記 strictly speaking is not "cosmogony." That would normally be 宇宙進化論, 天体演化学, or 宇宙进化论. FFXV's developers took some creative liberties here with 創星記, but you can see how they can justify it:
-創: establish, create
-星: star, planet
-記: record, chronicle