So I just heard about “Primed: The Back Pocket Guide for Trans Men and the Men Who Dig Them.” It’s the first sexual health resource written by and for gay, bi and queer trans men/ transmasculine people, put out by Rainbow Health Ontario, and it’s a very frank guide that answers basically any questions you might have about safer sex. They’ve released it for free download here.
Edit: here is the link to Brazen 2.0, a safer sex guide for trans women!