"The Bass of my Heart" is an autobiography about Magnus's life as a rock musician. Magnus has traveled around the world countless times, mostly as the bassist for the band Hammerfall.

His bass playing has enabled him to pursue his great interest in people and cultures, allowing him to experience various cultures from the inside.

He recounts his experience in La Paz, Bolivia, at an altitude of 4,200 meters (13,780 feet) above sea level, where supplemental oxygen was provided.

"It was easy to feel dizzy if one rocked too hard due to the thin air."

Or when he opened a Blues Festival in the Himalayas and ended up featured on a full page in the Himalaya Daily News, with headlines celebrating his success.

Magnus is a groundbreaking and innovative rock musician who has performed with Hammerfall and the Gothenburg Opera Symphony Orchestra, just to mention a few collaborations.

He shares not only the beautiful moments but also the dark ones, such as the mysterious disappearance and the murder of their manager, Lelle.

To explore more about Magnus’s fascinating journey, delve into "The Bass of my Heart."

One of our first gigs of the tour was at Wacken Open Air festival, one of Europe’s largest heavy metal festivals. Before the gig, our tour manager told us to go to a record store for a signing session. I thought to myself, a signing session—what is that? I could not imagine that anyone would want our autographs as we had just released our first album and had never been on tour before. With no expectations, we drove to this small town, and when we arrived outside the record store, there were long queues. I wondered who else was there when I saw a table, five chairs, and on the table, photos of us, Hammerfall members. I looked around in surprise for other bands, but we were the only ones there. Everyone who had gathered was there for us. It felt unreal but at the same time very exciting. There and then, I got to sign autographs for the first time and look into the eyes of our excited fans. It took a while before we were ready to head back to the festival. We had our leather pants on and some other things we managed to find in our wardrobes to create the right rock image. As my feet slipped into the boots, with my bass hung over my shoulder and the rest of the band ready, things really started to feel cool. We stepped on stage at our first tour gig and rocked out in front of thousands of people in the audience.