Difference Between Book on sap press and Advice on which book I should take ?

Hello,

Could someone explain me the difference between those two Sap Press.

SAP CRM Web Client Customizing and Development

http://www.sap-press.com/products/SAP-CRM-Web-Client-Customizing-and-Development.html

SAP Web Client: A Comprehensive Guide for Developers

http://www.sap-press.com/products/SAP-Web-Client%3A-A-Comprehensive-Guide-for-Developers.html

I thought that web client were only in SAP CRM ?

I have only done ECC and CRM.

did the SAP Web Client include the SAP CRM web Client ?

As I wiork on SAP CRM, I suppose that the "SAP CRM Web Client Customizing and Development" would be the better choice.

Best Regards.

Abdou BOURAKBA