Is there a price book for Azure through CSP ?

No, there is no price book for Azure through CSP. Azure through CSP follows a pay as you consume billing model. So, the billing is based on what the customer consumes on a monthly basis.

But you can look up for Azure resource unit price per billing unit in the Azure website and in the Azure price calculator. Refer link here

The CSP pricing that the partner gets are based on the CSP discounts and the list price in the Azure website. So, the prices follow the changes as seen in the online pricing.

Make sure to understand the currency fluctuations impact if your billing currency in CSP is the not the same as the local currency. For example, South East Asia region follows US dollars in CSP program as against the local currencies.