The no.1 book I recommend for parents to get for their teens
How to talk about it by Erika Moen and Matthew Nolan.
This book has quickly become my most recommended book. I love it because it's accessible, inclusive, straightforward, and informative:
Accessible
it's graphic comic style which makes it so easy to read, especially for the non-readers
each chapter is a group of friends, or a couple, or siblings chatting with each other about the topic. Eg, two friends clothes shopping and chatting about body image, a big (young adult) sister chatting to a little (teen) sister about when you're ready for sex, a couple talking about and practicing aftercare after sex, two male friends talking about rejection and what it means and how to deal wtih it and how not to deal with it - and when a relationship or your behaviour can become toxic/abusive
this style makes it super relatable and easy to take in
the chapters are short, simple, factual and to the point
Inclusive
the comic drawings in this book are super inclusive - there are all body types, races, abilities and genders (I especially loved seeing different body sizes and abilities, it is not often you see someone in a wheel chair or with a limb difference in a graphic comic)
in the puberty section the book mainly uses the terms "estrogen-rich bodies" and "testosterone-rich bodies" when discussing puberty. They preface this by saying "Bodies typically fall into one of two types, depending on their anatomy, genetics, and hormones. Testes historically label someone as "male", and lead to a testosterone-rich puberty. Ovaries historically label someone as "female" and lead to an estrogen-rich puberty" (note while this book is trans-friendly it isn't trans focused, I would recommend "What's the T?" if you are looking for a trans specific book).
Straightforward
it deals with gender and sexuality in a really simple way, everything is really easy to understand
I love the straightforward and factual descriptions of bodies without making a big deal of, or over explaining, any of it
it normalises identities beyond the usual binaries and I imagine it would feel inclusive for a teen reading it who was questioning their gender identity, or sexual identity
it is free of judgement and shame, eg there is a section that talks about kinks and porn in a really healthy way
Informative
it covers the basics like puberty, anatomy, self pleasure, gender, sexuality
but is also covers topics like jealousy and rejection, aftercare, porn, body image, sexting
If you are not sure how to give this to your teen you could always get it (and read it yourself first) then leave it on your teens bed with a note "Hey Sweetie, this book was recommended to me, I hope you enjoy it, remember I am here for any questions you may have". If they aren't ready to read it they will have it handy for when they are.
Both my teen and my tween have read this. I only let my 10 year old read it because she knows a lot about everything that is covered in the book anyway. I wouldn't recommend just handing this to a tween who hasn't had any sex positive sex ed yet. But for any teen, especially older teens this book is ideal.