I'm glad She Comes First worked for you.
Sage will be in here shortly to tout The Guide to Getting it On!, I'm sure.
But I want to pre-endorse that book, because it's a great one (and highly entertaining) to get some ideas from.
We bought it and I love to peruse its pages when I'm feeling horny.
And there's always the classic, The Joy of Sex... though I don't know if anyone (other than my parents) knows about it, in our generation. Seems to have gone out of fashion in the last few decades.