Combine Multiple InDesign Documents

A fre­quent ques­tion is: How do I import or place one InDesign doc­u­ment into anoth­er to com­bine them?

Excellent ques­tion, but you don’t start from import or place.

Open both the source and des­ti­na­tion doc­u­ment in InDesign, and tile the two win­dows. Now, in the Pages palette of the source doc­u­ment, whose pages you want to place in the oth­er, select all the pages (click on the first, SHIFT-click on the last), and then drag the icons from the Pages palette and drop them into the des­ti­na­tion doc­u­ment. Bing, bang, boom! Two doc­u­ments, now merged.