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The best I can think are:
- We Both Laughed in Pleasure by Lou Sullivan
- Becoming a Visible Man by Jamison Green
Some other transmasc perspectives:
- Welcome to St. Hell a graphic memoir by Lewis Hancox
- Gender Queer another graphic memoir by Maia Kobabe (some non-binary representation)
There is also the 1997 documentary film You Don't Know Dick which features Jamison Green and Loren Cameron, it's dated but interesting and focused on a trans male experience.
I personally recommend not reading Leslie Feinberg's Stone Butch Blues (mostly because it's traumatizing and not particularly affirming; I still think it's important to read, but maybe for much later in transition and only if mentally willing to expose yourself to certain triggers).
Even if Serano's personal experiences aren't as relevant, I still think Whipping Girl overall is relevant to trans men (particularly the way violence against trans men is connected to transmisogyny and the feminist and trans theory that goes on), and I also recommend Serano's Sexed Up as also relevant to all trans folks.