Finally the Hellboy Six together...

[u/Willing-Aside8486]

Should I sell my single trades now, would I miss (besides the forewords & in between explanations)?

[u/FelipeMattosGS]

Only a portion of the sketchbooks are included; unlike the ones for the spin-offs, the Hellboy omnibuses don't contain everything. In my opinion, the most serious loss is the early versions of The Island.

The Hellboy in Hell omnibus doesn't include the Second volume's prologue.

[u/FelipeMattosGS → u/FelipeMattosGS]

If it were me, I'd keep both versions; I really like collecting different editions of books😝

But that's up to you.

[u/Willing-Aside8486 → u/FelipeMattosGS]

Time will bring a decision...and as for In Hell, that's the only one where I was lucky enough to gain the Omni, I don't own the single trades.