Thank you so much for another great ebook upload.
I have the Megapack set from Kindle which is good but lacks the illustrations which you include and which are in my old hardback copies. It is wonderful to get the first seven of the books as they originally appeared in an omnibus volume.
As to the final book,
The Robot Rocket, I have it as a separate copy and eventually it may become available as an ebook, but while it's OK, it isn't nearly as good as the earlier books, tending to rehash older material and ideas, as well as breaking the team up in a completely gratuitous way.