Answer
From Islam perspective, the holy book of Jesus is the Gospel (Injeel in Arabic). Muslims believe in all God holy books including Torah, Psalm, Gospel (Injeel), and Quran.
Quran says (Meaning English translation):
- " .. and in their (Jews and Moses) footsteps, we (God) sent Isa (Jesus), son of Maryam (Mary), confirming the Taurat (Torah) that had come before him, and We (God) gave him the Injeel (Gospel), in which was guidance and light and confirmation of the Taurat (Torah) that had come before it, a guidance and an admonition for the pious... Let people of the Injeel (Gospel) judge by what Allah (God) has revealed therein and whosoever does not judge by what Allah (God) has revealed (then) such people are the rebellious and disobedient to Allah (God)"
[Quran, chapter 5, verses 46-47]
- " It is he (God) Who has sent down the book (Quran) to you (Prophet Mohamed) with truth, confirming what came before it, and He (God) sent down the Taurat (Torah) and the Injeel (Gospel), before as a guidance to mankind...."
[Quran, chapter 3, verses 3-4]