Scanning double sided mags with PS
Unlike in SolarJM's example (again thanks for the great hints!) we have different or one picture that spread over to pages and have NO content gaps:
1) At first scan both single sides you want to become on image making the scan overlapping a bit so that PS can auto align them.
Scan one, then the other and then paste the second into the first, as a new layer.
2) Auto-Align them by selecting both layer (use CTRL when clicking both layers), then chose Edit > Auto-Align Layers
3) Now after one another crop the layers so that only a minimal part is overlapping, but do not cut away too much because the blending (next step) will not look that good anymore.
4) Select both layers again and choose Edit > Auto-Blend Layers
5) Merge the layers
6) Crop the image removing all the edges.
Voilą, you have one beautiful image that has no viewable break.
You can find examples in all my scans, take this e.g.: