Al-Quran.
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Inilah al-Quran yang memimpin ke arah jalan yang lurus" (surah al-Isra':9)
"Al-Quran benar-benar telah termaktub dalam kitab-kitab yang terdahulu." (surah as-Syu'araa: 196)
"dan agar aku membaca al-Quran. Sesiapa yang bersedia menerima hidayah, dia telah memberi petunjuk bagi diri sendiri, dan siapa pun yang sesat, katakanlah, 'Saya hanya seorang pemberi peringatan'." (surah an-Naml:92)
For the benefit of those who do not understand Arabic, there are various prints of Al-Quran that comes with translation. My personal choice so far would be these two:

(Pic. left: Susunan pengenalan, makna, & kod-kod tajwid oleh Ustaz Mahadi Dahlan Al-Hafiz & Ustaz Azharuddin Sahil, disemak oleh Dr. Muhammad Uthman el-Muhammady)
This Al-Quran is written in Rasm Uthmani, has tajwid guide & explanation, as well as translation in BM. It also has a brief history before the beginning of every surah. It comes in volumes (from Jilid 1 to Jilid 10), and each Jilid would consists of 3 Juz. For those who've been reading the Quran without understanding what is being recited, may I also humbly suggest as I'm reminding myself that it's time to improve, and start reading it with its translation in order to understand more.
Price: Very affordable, ranges from RM14-RM19, depending on the Jilid (some contains longer surahs).
Suitable to be given as gifts. The elderly may appreciate it more, for the prints are big and easy to read. I have 20-20 vision but I too prefer big prints!

(Pic. left: Syamil Al-Quran terjemahan per-kata)
This Al-Quran is big, but the prints are smaller than the one I mentioned above. It has the whole surahs in. It is worth mentioning that this particular Al-Quran is written with translation for each word, and the full translation for each verse is written at the side of each page.
Price: Slightly on the high side, ranges from RM90-RM150, depending on the place one buys it. Mine, I got it at RM100. Once I bought two wall clocks with quranic verses from a shop (something like Little Egypt) and the taukeh Pak Arab offered me this Quran at RM90 because I bought two clocks from his shop. But at other times, I saw at other shops this Quran is sold at more than a hundred ringgit.
This is Al-Quran Majid (according to my mengaji teacher), which is written slightly different from Rasm Uthmani (those who've learnt tajwid would know what I mean). Some says Rasm Uthmani is easier to read. From my experience, it is true, but I also find it is helpful to have this Al-Quran, as I sometimes do cross-reference on the words which I'm not sure of the pronounciation. For instance, had I not learnt tajwid, I would have 'langgar' this hidden 'nun' such as in this ayat:
إِنَّا زَيَّنَّا ٱلسَّمَآءَ ٱلدُّنۡيَا بِزِينَةٍ ٱلۡكَوَاكِبِ (٦)
I would have read the ayat as : "inna zaiyyannassamaa addunyaa bizinatin kawaakib". Or sometimes "...bizinatil..." Because I do not know how to join the alif lam mati with baris dua bawah. That's how ignorant I was.
It should be read as: inna zaiyyannassamaa addunyaa bizinatinil kawaakib.
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Bacalah al-Quran dengan bertartil (memelihara hukum tajwid)" (surah al-Muzammil:4)

Which is why sometimes I do the cross-reference with this al-Quran when there are moments I'm not so sure, as in this al-Quran the 'hidden' nun is written below the alif, in small print, to remind the reader on how it should be read. This 'hidden' sound does not only exist in Arabic, as in English too we have 'silent' sounds like silent 'b' in the word debt and silent 'h' in the word hour. Had we not learn this, we too would have pronounce debt as deb and hour as hawe, wouldn't we? The meanings of the words have either totally changed or become totally meaningless.
Only when we begin to learn, we'd notice of things that we're not even aware that we're ignorant of.
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"Al-Quran benar-benar diturunkan Allah, Tuhan semesta alam. Dia dibawa turun oleh Ruhul Amin (Jibril). Masuk ke dalam hatimu agar kamu menjadi salah seorang yang memberi peringatan. " (surah As-Syu'araa:192-194)
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"Kami turunkan al-Quran sesuatu yang menjadi penawar dan rahmat bagi orang mukminin" (Surah al-Isra':82)
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"Bila al-Quran Kami turunkan kepada orang selain Arab. Lalu dibacakan kepada mereka, mereka pun tidak pula beriman. Demikianlah Kami masukkan al-Quran ke dalam hati orang yang penuh dosa." (surah as-Syu'araa: 198-200)
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"Sehingga apabila mereka sampai, Allah berfirman, 'Kamu telah mendustakan ayat-ayatKu, tanpa kamu pelajari dan kamu teliti apa yang kamu kerjakan.' Mereka ditimpa seksaan kerana kezaliman, dan mereka sama sekali tidak berkata-kata." (surah an-Naml:84-85)
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"Ini adalah sebuah kitab yang Kami turunkan kepadamu dengan penuh barakah supaya mereka memperhatikan ayat-ayatnya dan supaya orang yang mempunyai fikiran mendapat peringatan (pelajaran)" (surah Sod:29)
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"Dan apabila engkau (Muhammad) membaca Al-Quran, Kami adakan suatu dinding yang tidak terlihat antara engkau dan orang-orang yang tidak beriman kepada kehidupan akhirat" (surah al-Isra':45)
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"Dan sekiranya ada suatu bacaan (kitab suci) yang dengan itu gunung-gunung dapat digoncangkan, atau bumi jadi terbelah, atau orang mati dapat berbicara, (itulah Al-Quran)." (surah ar-Rad:31)
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"Kalau sekiranya Kami menurunkan Al-Quran ini kepada sebuah gunung, pasti kamu akan melihatnya tunduk terpecah belah disebabkan takut kepada Allah. Dan perumpamaan-perumpamaan itu Kami buat untuk manusia supaya mereka berfikir." (surah al-Hasyr:21)