SELECT T2.document_type_name FROM All_documents AS T1 JOIN Ref_document_types AS T2 ON T1.document_type_code  =  T2.document_type_code WHERE T1.document_name  =  "How to read a book"
Find the document type name of the document named "How to read a book".
SELECT T2.document_type_name FROM All_documents AS T1 JOIN Ref_document_types AS T2 ON T1.document_type_code = T2.document_type_code WHERE T1.document_name = `` How to read a book ''
select t2 . document_type_name from all_documents as t1 join ref_document_types as t2 on t1 . document_type_code = t2 . document_type_code where t1 . document_name = value
Find the document type name of the document named `` How to read a book '' .