I work in the SAP Business Warehouse environment since 2012. I worked for several companies in several different projects. Since 2014 I write the blog https://www.reyemsaibot.com about the top Analysis for Office, SAP Business Warehouse, ABAP and SAP HANA
I published the first edition of SAP Analysis Office - The Comprehensive Guide in 2016 and since January 2020 you can get the 5th edition of it. I worked as a team lead and also developed an automatic reporting tool for Analysis for Office.