A Sydney man charged with smuggling cocaine in children’s books will appear in court today.

Customs officers discovered the alleged drugs in two separate shipments of books that were sent from Portugal to Sydney earlier this month.

The 1.7kgs cocaine haul had an estimated street value of $645,000, police say.

The books were sent to Sydney from Portugal, authorities say. (Supplied)

The cocaine hidden inside the books had a street value of $645,000, police say. (Supplied)

Following inquiries, a 31-year-old man was arrested at his home in Sydney’s eastern suburbs last Friday.

Police also found electronic devices, documents and an amount of cannabis during a search of the home.

The man was charged with import commercial quantity of border-controlled drug and issued two cannabis cautions.