If the design remains a correct quality of another production comparison, the level is well below what we proposed Rosinsky De Vita and even on the first two volumes. To believe that the work was done in a hurry history to release the album soon after the above. I have nothing against the nearest exits but it must offer a good product.
Side scenario, I really did not like the turn of Volume 3 and this is confirmed. I do not dwell on details, many people were very clear on the defects of the story.
A rant for a miserable paging. I think 48 pages for this type of work (even if the quality is not at the rendezvous) is no longer in tune with what a reader expects. It reads too quickly. For me, these 4 volumes, it could have done two and take the time to do better (especially for 3 and 4).
Finally, I find a parallel series must be able to read more or less Independent manner. The links with other World Series of Thorgal are too large and "oblige" the reader to obtain the other series to understand at best. This is not a process that I find adequate to the worlds of Thorgal which sell very well without it.
A reading that I recommend that the biggest fans of the series, with the risk of being disappointed. It is a matter of taste.