What is the first step a librarian should take upon receiving books and supplies?

The first step a librarian should take upon receiving books and supplies is to check them against the purchase order. This process ensures that what has been delivered matches what was ordered in terms of quantity, titles, and formats. Verifying the contents allows the librarian to identify any discrepancies, such as missing items, incorrect shipments, or possible damage during transit. This step is crucial for maintaining accurate inventory records, ensuring that the library's collection remains up-to-date and relevant, and for addressing any issues with the supplier in a timely manner.

Once this verification is complete and any discrepancies resolved, the librarian can then proceed to catalog the items, put them on the shelves, or decide what to do with unneeded items, making sure everything is in order for library users.