The Book of Allah is one with all prophets.in following ayat prohets are in plural and book is in singular i.e one book is revealed with all prophets
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kaana alnnaasu ummatan waahidatan faba'atsa allaahu alnnabiyyiina mubasysyiriina wamundziriina wa-anzala ma'ahumu alkitaaba bialhaqqi liyahkuma bayna alnnaasi fiimaa ikhtalafuu fiihi wamaa ikhtalafa fiihi illaa alladziina uutuuhu min ba'di maa jaa-at-humu albayyinaatu baghyan baynahum fahadaa allaahu alladziina aamanuu limaa ikhtalafuu fiihi mina alhaqqi bi-idznihi waallaahu yahdii man yasyaau ilaa shiraathin mustaqiimin

audio (All) people are a single nation; so Allah raised prophets as bearers of good news and as warners, and He revealed with them the Book with truth, that it might judge between people in that in which they differed; and none but the very people who were given it differed about it after clear arguments had come to them, revolting among themselves; so Allah has guided by His will those who believe to the truth about which they differed and Allah guides whom He pleases to the right path.