I have heard talk of 4 books mentioned in the quran. Ca anyone explain what these books are and who they are directed at?
The Quran mentions 3 previous revelations.
Tawrat (Torah) sent to Mussa (moses) Zabur (the psalms) sent to Dawud (king David) Injil (the bible) Sent to Isa (Jesus) The Tawrat in quran
إِنَّا أَنزَلْنَا التَّوْرَاةَ فِيهَا هُدًى وَنُورٌ ۚ يَحْكُمُ بِهَا النَّبِيُّونَ الَّذِينَ أَسْلَمُوا لِلَّذِينَ هَادُوا وَالرَّبَّانِيُّونَ وَالْأَحْبَارُ بِمَا اسْتُحْفِظُوا مِن كِتَابِ اللَّهِ وَكَانُوا عَلَيْهِ شُهَدَاءَ ۚ فَلَا تَخْشَوُا النَّاسَ وَاخْشَوْنِ وَلَا تَشْتَرُوا بِآيَاتِي ثَمَنًا قَلِيلًا ۚ وَمَن لَّمْ يَحْكُم بِمَا أَنزَلَ اللَّهُ فَأُولَٰئِكَ هُمُ الْكَافِرُونَ - 5:44
Indeed, We sent down the Torah, in which was guidance and light. The prophets who submitted [to Allah ] judged by it for the Jews, as did the rabbis and scholars by that with which they were entrusted of the Scripture of Allah, and they were witnesses thereto. So do not fear the people but fear Me, and do not exchange My verses for a small price. And whoever does not judge by what Allah has revealed - then it is those who are the disbelievers.
he zabur in quran
وَرَبُّكَ أَعْلَمُ بِمَن فِي السَّمَاوَاتِ وَالْأَرْضِ ۗ وَلَقَدْ فَضَّلْنَا بَعْضَ النَّبِيِّينَ عَلَىٰ بَعْضٍ ۖ وَآتَيْنَا دَاوُودَ زَبُورًا - 17:55
"And your Lord is most knowing of whoever is in the heavens and the earth. And We have made some of the prophets exceed others [in various ways], and to David We gave the book [of Psalms]."
The Injil in the quran
ثُمَّ قَفَّيْنَا عَلَىٰ آثَارِهِم بِرُسُلِنَا وَقَفَّيْنَا بِعِيسَى ابْنِ مَرْيَمَ وَآتَيْنَاهُ الْإِنجِيلَ وَجَعَلْنَا فِي قُلُوبِ الَّذِينَ اتَّبَعُوهُ رَأْفَةً وَرَحْمَةً وَرَهْبَانِيَّةً ابْتَدَعُوهَا مَا كَتَبْنَاهَا عَلَيْهِمْ إِلَّا ابْتِغَاءَ رِضْوَانِ اللَّهِ فَمَا رَعَوْهَا حَقَّ رِعَايَتِهَا ۖ فَآتَيْنَا الَّذِينَ آمَنُوا مِنْهُمْ أَجْرَهُمْ ۖ وَكَثِيرٌ مِّنْهُمْ فَاسِقُونَ - 57:27
Then We sent following their footsteps Our messengers and followed [them] with Jesus, the son of Mary, and gave him the Gospel. And We placed in the hearts of those who followed him compassion and mercy and monasticism, which they innovated; We did not prescribe it for them except [that they did so] seeking the approval of Allah . But they did not observe it with due observance. So We gave the ones who believed among them their reward, but many of them are defiantly disobedient.