SAP ABAP books

Standard SAP books are the books which are Published by SAP itself. The SAP standard Books with their Codes :

TAW10 - ABAP Workbench Fundamentals
TAW12 – ABAP Workbench Concepts

SAPTEC - SAP Technologies
BC400 - ABAP Workbench
BC430 - ABAP Dictionary
BC401 - ABAP Objects
BC410 - Dialog Programming
BC405 - LIST Creation Techniques
BC402 - Advanced ABAP
BC414 - Database Updates
BC425 - Enhancements and Modifications
These Books contain the perfect principles n concepts of SAP. I advice you people not to follow some of the local books.
ABAP IN 21 DAYS book contails 30% wrong concepts, Don't mislead yourself following those books.