How do I get books with topics to open the topic on first click?

I am using Robohelp 10 (10.0.1.292) to (re) build a webhelp sample for my portfolio that I originally built in a SaaS tool called HelpIQ/ProProfs Knowledgebase. When I built that system, I had the typical TOC with books and topics, and because I don't like empty books, in that system, the books were also topics, typically the overview topics on a particular subject with links to the sub-topics.

In RH 10, WebHelp is my primary (and only) output. As I am (re)creating my TOC structure, I am taking the overview topics, converting them to books in the TOC and then making it a book with link and selecting the topic. All fine. But the output has one issue:

When I click on a book, just one action occurs: opening the book to show the sub-topics. What's interesting is that I can click on the book a second time, and the topic will display.

What should happen, what I expect to happen, what I have seen happen in the aforementioned tool, is that clicking on a book makes both happen with one click. Is there a way for RH's WebHelp output to do that?

Please note: Upgrading to the latest version is NOT an option for me; this is my personal version, and unless someone wants to donate a license for the latest version, I am stuck with this one.