Disappointing end series becomes food

Having discovered our heroes with this full collection, I waited impatiently for a year this new album and what a disappointment!
This sixth volume contains "Hostages of Ultralum," its sequel "The Orphan of the stars" and "For uncertain times" .If the first two episodes are frankly not exciting, the last is downright nonsensical tête.Je you referring to criticism solo albums to get a more detailed idea.
I forced myself to read the first two to the end, as the last I totally abandoned.
The authors are clearly lacking inspiration.
Short to buy to complete your collection, if not go your way, I believe that the series died with "Circles of power."
However I highly recommend the first 5 volumes.