What's the Name of That Book??? discussion

Here's another one. I read it about 15 years ago give or take. The series is probably from the 80's. Basically, there's an alternate dimension of telepathic snake-people. One day one of these snake-people breaks the barrier which leads directly into the protagonists apartment.
They give him a new and improved body w/telepathic functionality no extra charge. He helps them out.
I remember at least one antagonist is human.
I remember the protagonist has 4 or 5 younger human guys that help him win. There is some type of military relationship between them.
I remember their music is made of smell.
I recall a point where the friendly snake-people have to break into an apartment.
I remember that humans are given the ol' mind-wipe and used as cattle or something.
I remember big spiders that eat people.

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Just a blind guess, because your description isn't ringing any bells for me, but Serpent's Silverby Piers Anthony has "humanoid serpent people" according to its description. I haven't read it myself so I don't know if the rest fits.

Nope, definitely not that. The humans and snake-people live in two different dimensions and were for the most part unaware of each other's existence until the first book.

Tumah, are you still looking for this series?

Does this ring a bell to anyone? Sounds pretty cool.