Going down on (stimulating a girl's vulva with your mouth).
Inside there's information on:
how to use your tongue on a girl's genitals, both the basic technique and tips for those more experineced
how girls differ when it comes to oral sex
how as a girl you can stop worrying and start loving oral sex
how to have oral sex during a girl's period
how to go down on a girl safely

Fingering (stroking a girl's genitals). Inside you'll find information on:
how to do it, both the general technique and some special techniques
how to get her into the mood and play with her excitement
how to use a vibrator to get her excited
how to use her vaginal juice, how to find the right tempo and rhythm and what (not) to do when she comes
whether or not to insert fingers into her vagina