Did Hazrat Mirza Ghulam Ahmad (as), the Promised Messiah, receive a holy book?

That depends on what one calls a “book”. If it means any collection of revelations, then yes, for his revelations are collected in the Tadhkira. If it means a book bringing a new law, then no, and in that case Jesus (as) did not receive a book either.

The answer hangs on a single word. The word “book” is used in two ways. Sometimes it means a new law that founds a new religion, like the Torah that Moses (as) received. Sometimes it means the revelations a prophet receives, even if they bring no new law.

This can be seen with Jesus (as). He brought no new law but came to fulfil the Torah, as the second verse above says. Even so, the Gospel is spoken of as his book. So whoever calls both the Torah and the Gospel books is using the word in its wider sense. It then covers revelations with and without a new law.

By the same standard, Hazrat Mirza Ghulam Ahmad (as), the Promised Messiah, also received a book. God spoke to him in many revelations. They are collected in a volume called the Tadhkira. If every collection of revelations is a book, then this is one too.

If, on the other hand, “book” means only a book bringing a new law, then he did not receive a book, and neither did Jesus (as). What matters is that the same standard is applied to everyone. The law of Islam is complete in the Holy Qur’an, and the Promised Messiah (as) brought no new law.