The third Marvel Masterworks volume of The Defenders comics collects issues 17-21 of the series along with 2 issues of Marvel Two-in-One and excerpts from Giant-Size Defenders 2-4 (the Giant issues were basically mildly longer Defenders stories with various older comics featuring Defenders members, the main stories are included in this collection). The first three issues were written by Len Wein, finishing up his somewhat mediocre run here and handing off writing duties to Steve Gerber, well regarded the best writer the Defenders ever had. He handles the writing of every comic in this collection with the exception of 17-19 and Giant-Size 2. It should be noted with the exception of few random tag-alongs, the official roster of the Defenders for this collection is Dr. Strange, The Hulk, Valkyrie, and Nighthawk.
The main story from Giant-Size #2 starts off the collection and it's not a bad story at all. The Defenders are lured into a trap set by Asmodeus and become ensnared in their own personal hells. The Son of Satan (a character introduced in Ghost Rider's series and one that Gerber would cut his teeth on for a while in the character's early years) is called upon to assist them. It's a fun little standalone story written by Len Wein and good primer for the next few issues that end his run.
The three issue arc (#17-19) that follows has the Defenders teaming up with Luke Cage to stop a nefarious gang of villains that destroy buildings around New York City and threaten to explode a gamma bomb. It's a real throwaway gang of villains, they aren't very well written I thought (they only seem powerful when it suits the story, like at one point the Hulk is overpowered in strength by them) and it's really only appealing to me because I love the 70s version of Luke Cage. It's a fitting end to Wein's run though, not terrible, but not memorable either.
Steve Gerber's run begins with two issues of Marvel Two-in-One, a series that pairs The Thing up with various Marvel heroes. In these two issues, the team-ups are with Doctor Strange and Valkyrie. The story is straight up classic 70s Marvel weirdness that begins with a magical harmonica that causes someones worst fears to come to life and ends with Valkyrie and the Thing battling Enchantress and The Executioner in a small Vermont town. It continues in issue #20 of The Defenders where Val is kidnapped by a cult that she was a part of before being cursed by the Enchantress to become Valkyrie. The Defenders and the Thing show up to rescue her before she's mated with a God to give the Cult more power. I liked how this storyline becomes focused on Valkyrie's search for her past and finally has her encountering Enchantress.
The next 3 comics (#21, Giant-Size 3-4) are all standalone filler stories. The first one features a rouges gallery of villains called the Headmen who use mystical powers to create chaos in New York to distract from a heist they are trying to pull off. They actually succeed, setting up things for a future Defenders storyline. The first Giant-Size story has the Defenders along with Sub-Mariner and Daredevil becoming pawns of the Grandmaster in a game he's playing with The Prime Mover that takes place across time and space. Pure insanity and fun, it's great to see the various team-ups that happen in this story. The final comic here starts with Nighthawk and his lady friend being blown up in a car and put into the hospital. Off all people, Hank Pym (in his little seen Yellow-Jacket getup here) teams up with the remaining Defenders to figure out who did it and make them pay. It's actually quite a dark story and ends in a very unexpected manner.
Also included are some short bonus comics from various series from the 50s that tell the back story members of the Headmen. Great archival stuff to include here.
I know it seems like I'm really heaping tons of praise Steve Gerber's way here, but it's well deserved. Once Steve Englehart left the series, it kind of resorted to the standard superhero fare of the Silver Age that didn't really progress the series or it's characters at all. Gerber really excelled at creating these complex, interesting stories that addressed a lot of social issues at the time and even the unaddressed reality of a world inhabited superheroes (when the Hulk destroys a regular familyman's house, a moment is given for the man to contemplate how their lives are ruined). He liked taking these characters teaming them up with random heroes and tossing them into different realms, planets, or places in time and letting things get crazy while still keeping it fun. You'll really see this come into play in the fourth Marvel Masterworks volume when they team up with the original Guardians of the Galaxy lineup.
A great read, not to be missed!