Change “book a class”

Yes. Per the FAQs:

Developers, you can completely customise the way the post type displays by copying the plugin templates to your theme and customising them there. You may be familiar with this method of templating as used by WooCommerce.
In the plugin’s root directory you will find a folder called rezdy-template. You can override that folder and any of the files within, by copying them into your active theme ie. yourtheme/rezdy-template. Rezdy Reloaded plugin will automatically load any template files you have in that folder in your theme, and use them instead of its default template files. If no such folder or files exist in your theme, it will use the ones from the plugin.
This is the safest way to customise the Rezdy Reloaded templates, as it means that your changes will not be overwritten when the plugin updates.

You will find the ‘Book Class’ text in /rezdy-template/single-rezdy-items.php Line 22

Another creative solution would be to use Say What? plugin to alter just that text string. Install and activate the Say What? plugin, then go to Tools > Text Changes > and configure the string you want to replace as follows:
String: Book Class
Text-domain: reloaded-rezdy

Here’s a screenshot showing the settings in Say What plugin: https://nimb.ws/d1JYn3
And here’s the result: https://nimb.ws/PqiA85

Let me know how you go ??

• This reply was modified 7 years, 6 months ago by Maeve Lander.

Well, Say what? worked like a charm. Thanks so much Maeve.

No problemo! ??